# DECT and wireless voice devices

Canonical: https://warmtransfer.net/knowledge/dect-wireless-voice

Last verified: 2026-09-24

The Cisco IP DECT 6800 Series provides wireless voice communication using dedicated base stations and handsets[^4][^3]. Cisco's support page lists the product series release date as 14 January 2019 and showed no end-of-sale or end-of-life notice as of 2026-09-24[^54].

## Infrastructure components and handsets

The IP DECT 6800 Series infrastructure consists of the Cisco IP DECT 110 Single-Cell Base Station, the Cisco IP DECT 210 Multi-Cell Base Station, and the Cisco IP DECT 110 Repeater[^4]. The compatible handset models are the Cisco IP DECT Phone 6823, the Cisco IP DECT Phone 6825, and the IP65-rated Cisco IP DECT Phone 6825 Ruggedized[^3]. The 6825 handset includes an emergency button and Bluetooth support, whereas the 6823 handset lacks both features[^5].

Handset batteries require charging for at least 10 hours before initial use[^42]. According to the product data sheet, 6800 Series handsets deliver up to 17 hours of narrowband talk time, 12 hours of wideband talk time, and 200 hours of idle time, requiring a 6-hour recharge cycle[^45].

## Radio frequency and cell capacity

The 6800 Series DECT RF band is programmed at the factory according to regional regulatory requirements and cannot be altered by customers[^52].

| Region | Operating band | Power notes |
| --- | --- | --- |
| United States and Canada | 1920 to 1930 MHz[^14] | Standard power[^14] |
| European Union and APAC | 1880 to 1900 MHz[^12] | Standard power[^12] |
| Australia and New Zealand | 1880 to 1900 MHz[^12] | Reduced power[^12] |
| LATAM and Argentina | 1910 to 1930 MHz[^13] | Standard power[^13] |
| Chile | 1910 to 1930 MHz[^13] | Reduced power[^13] |
| Brazil and Uruguay | 1910 to 1920 MHz[^13] | Not stated |
| Taiwan | 1880 to 1895 MHz[^13] | Standard power[^13] |

In the United States, 47 CFR 15.323 restricts isochronous unlicensed PCS (UPCS) devices to the 1920 to 1930 MHz sub-band[^41]. Furthermore, 47 CFR 15.323(c) mandates that UPCS devices monitor intended time and spectrum windows before transmission for at least 10 ms on systems with frame periods of 10 ms or less[^40].

Indoors, each 6800 Series base station and repeater covers a range of up to 50 meters (164 feet), expanding up to 300 meters (984 feet) outdoors[^50]. Cisco recommends conducting site planning using the integrated site survey tool on the handset[^58].

Hardware cell limits depend on the deployed base model:
- A DBS-110 Single-Cell Base Station registers up to 20 handsets and links with up to 6 repeaters[^32][^33]. Data sheet specifications state that a single-cell deployment supports up to 30 SIP registrations and 10 concurrent calls[^34].
- Two DBS-110 Single-Cell Base Stations can form a dual-cell deployment supporting up to 20 concurrent calls[^39][^34].
- A DBS-210 Multi-Cell Base Station registers up to 30 handsets locally and connects up to 3 repeaters[^35][^36].
- In a full multi-cell system, the data sheet rates the DBS-210 architecture for up to 1000 SIP registrations and 2000 concurrent calls when 254 base stations are active[^37]. Sources disagree on the maximum multi-cell base limits: Control Hub documentation rates a DBS-210 multi-cell network for up to 254 base stations, whereas Cisco getting-started documentation specifies a maximum of 250 base stations, or 50 base stations combined with 100 repeaters[^49][^48].

## Network protocols, security, and power

The base station can be powered via IEEE 802.3 PoE power class 2 (drawing 3.84 to 6.49 W) or an external regional power adapter, while repeaters must use an external power adapter[^15]. The device networking protocol stack includes LLDP, CDP, DHCP, DNS, NTP, TFTP, HTTP/HTTPS, SIP, RTP/RTCP, and SRTP[^47].

Security capabilities listed in the multiplatform firmware data sheet encompass CAT-iq 2.1 over the air interface, TLS signaling encryption, and SRTP for media transport[^53]. SIP transport options include UDP, TCP, and TLS[^57]. For call server redundancy, the base station supports up to 6 NAPTR records and 12 SRV records[^56]. Automatic failover to an alternate SIP proxy initiates upon RFC 3261 timer expiration, reception of a 5xx response code, or TCP connection termination[^55].

## Deployment and call control platforms

Cisco specifies a staged deployment workflow: charge handsets, collect handset IPEI numbers alongside user details, perform a site survey, mount and apply power to the base station, allow network auto-configuration, configure handset parameters via the base station web interface, register handsets, and distribute units[^38]. Registration on the handset occurs via Connectivity > Register, selecting an available slot, and submitting an access code if configured[^44].

Official platforms listed on the data sheet include Cisco Webex Calling, Webex Calling Carrier, Cisco BroadWorks, Asterisk, and Metaswitch[^31]. Release notes for firmware 5.1(3)SR1 specifically certify BroadSoft BroadWorks 22.0 and later as well as Asterisk 13.1 and later[^51].

### Cisco Webex Calling

In Webex Calling via Control Hub, administrators configure DECT networks under Services > Calling > Features > DECT Network by selecting Add New, specifying the location, naming the network, and choosing the base hardware model[^19]. The workflow sequences through location and naming, idle screen text configuration, DBS-110 or DBS-210 selection, PIN definition, base station MAC entry, and handset user assignment[^21]. Base station MAC addresses can be entered up to 5 at a time[^20].

Control Hub manages DBS-110 units as single-cell networks, while DBS-210 hardware supports single-cell, dual-cell, and multi-cell deployments up to 254 bases[^18]. A single DECT network cannot mix DBS-110 and DBS-210 models[^22]. Networks support up to 1000 total lines, and individual handsets can maintain up to 2 distinct lines[^16][^23]. Handset lines may be assigned to users, workspaces, or virtual lines, and can include numbers mapped from separate Webex Calling locations[^17].

### Cisco Unified Communications Manager (CUCM)

When integrating with CUCM, each Cisco IP DECT 6825 handset is configured as a separate Third-party SIP Device (Advanced)[^30]. The base station itself is never added as a CUCM device, and its MAC address must not be entered into handset device profiles[^25]. Handset authentication requires unique CUCM end users with digest credentials that are mirrored in the base station web interface[^27]. SIP transport for CUCM connections is configured for TCP[^29]. Features on CUCM are restricted to basic telephony operations including placing, receiving, holding, transferring, and conferencing calls[^26]. WarmTransfer's reading of the sources is that CUCM serves as a secondary integration path because it is omitted from primary data sheet platform listings and forces handsets into generic third-party SIP device definitions[^28].

## Firmware maintenance and operational caveats

As of 2026-09-24, the latest available firmware release was 5.1(3)SR1, published on 7 May 2026[^46]. Upgrading to 5.1(3)SR1 requires base stations to already be running version 5.0(1) or 4.8(1)SR1[^60]. Upgrades must occur sequentially: administrators must update the base station first and wait for completion before updating handset units[^59].

Firmware 5.1(3)SR1 introduces user-selectable audio tuning options in the handset main menu, adds a Transfer button menu option to switch between call transfer and merging, and enables consult transfer on a second line without requiring manual line selection[^1][^2]. However, firmware 5.1(3)SR1 contains an open caveat, CSCwt67703, which causes complete audio loss when calls negotiate the G.729 codec on a multi-cell network[^43].

## Wi-Fi wireless alternatives

The Cisco Wireless Phone 840 and 860 rely on 2.4 and 5 GHz 802.11 a/b/g/n/ac Wi-Fi networks rather than DECT devices[^11]. The 840 chassis carries an IP65 ingress rating, whereas the 860 is rated IP68[^7]. Supported call control platforms include CUCM versions 11.5(1)SU8, 12.5(1)SU3, and 14.0(1), as well as Webex Calling with firmware 1.6 or later[^6]. When registering to Webex Calling, the phones require firmware version 1.6 or higher and are onboarded in Control Hub via MAC address[^6][^10]. The Wireless Phone 800 series supports push-to-talk over multicast when a multicast address is configured[^9]. Cisco notes that the 840 and 860 may not work during a power failure because they depend on the Wi-Fi network to carry calls[^8].

## Applicability

Applies to: Cisco IP DECT 6800 Series, Cisco IP DECT Phone 6823, Cisco IP DECT 110 Single-Cell Base Station, Cisco IP DECT 210 Multi-Cell Base Station, Cisco IP DECT DBS-110, Cisco IP DECT DBS-210, Cisco IP DECT 6823, Cisco IP DECT 6800 Series with CUCM, Unlicensed PCS devices, Cisco Webex Calling, and Cisco Wireless Phone 840. Deployments: on-premises, multi-tenant, any, on-premises-hardware, and service-provider. Sources checked 2026-09-24. The IP DECT 6800 Series is certified for BroadSoft BroadWorks 22.0 and later, Asterisk 13.1 and later, and CUCM 11.5(1)SU8, 12.5(1)SU3, and 14.0(1) for Wireless Phone 800 models[^51][^6]. Regional DECT frequency allocations apply to the United States, Canada, the European Union, APAC, Australia, New Zealand, LATAM, Argentina, Chile, Brazil, Uruguay, and Taiwan[^14][^12][^13]. Firmware upgrade prerequisites require versions 5.0(1) or 4.8(1)SR1 prior to installing 5.1(3)SR1[^60].

## What remains uncertain

DECT handset emergency calling and location (E911 / RAY BAUM's) on Webex Calling is not covered by the sources below. Per-base concurrent call capacity narrowband vs wideband for DBS-110 and DBS-210 is not covered by the sources below. End-of-sale status and successor product for IP DECT 6800 is not covered by the sources below. Multicell sync chain levels and RSSI and overlap thresholds from the 6800 deployment guide PDF are not covered by the sources below. CUCM minimum release and licence tier for DECT 6800 handsets as third-party SIP devices is not covered by the sources below. Control Hub DECT network migration tool prerequisites and behaviour is not covered by the sources below. Third-party DECT systems (Yealink W-series and Poly Rove and Spectralink) on Webex Calling and Teams are not covered by the sources below. Cisco Wireless Phone 840 and 860 WLAN deployment guide requirements are not covered by the sources below.

## Sources

[^1]: Firmware 5.1(3)SR1 lets admins and users select audio tuning options from the handset main menu. Source: [Cisco IP DECT 6800 Series Release Notes for Firmware Release 5.1(3)SR1](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/firmware/5-1-3/p685_b_cisco-ip-dect-6800-seriesrn513V2.html), New and changed features > audio tuning. Checked 2026-09-24.
[^2]: Firmware 5.1(3)SR1 adds a menu on the Transfer button so the user can choose between merging calls and transferring, and adds consult transfer on the handset's second line without manual line selection. Source: [Cisco IP DECT 6800 Series Release Notes for Firmware Release 5.1(3)SR1](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/firmware/5-1-3/p685_b_cisco-ip-dect-6800-seriesrn513V2.html), New and changed features. Checked 2026-09-24.
[^3]: The Cisco IP DECT 6800 Series handsets are the Cisco IP DECT Phone 6823, the Cisco IP DECT Phone 6825 and the IP65-rated Cisco IP DECT Phone 6825 Ruggedized. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series (chapter)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_01011.html), Cisco IP DECT 6800 Series chapter > handsets. Checked 2026-09-24.
[^4]: The Cisco IP DECT 6800 Series infrastructure consists of the Cisco IP DECT 110 Single-Cell Base Station, the Cisco IP DECT 210 Multi-Cell Base Station and the Cisco IP DECT 110 Repeater. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series (chapter)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_01011.html), Cisco IP DECT 6800 Series chapter > product components. Checked 2026-09-24.
[^5]: The 6825 handset has an emergency button and Bluetooth support; the 6823 handset has neither. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series (chapter)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_01011.html), Cisco IP DECT 6800 Series chapter > handset comparison. Checked 2026-09-24.
[^6]: The Wireless Phone 800 data sheet lists CUCM 11.5(1)SU8, 12.5(1)SU3 and 14.0(1), and Webex Calling with firmware 1.6 or later, as call control. Source: [Cisco Wireless Phone 800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/webex-wireless-phone/datasheet-c78-744461.html), Specifications table > call control. Checked 2026-09-24.
[^7]: The Cisco Wireless Phone 840 is rated IP65 and the 860 is rated IP68. Source: [Cisco Wireless Phone 800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/webex-wireless-phone/datasheet-c78-744461.html), Specifications table > ingress protection. Checked 2026-09-24.
[^8]: Cisco warns that the 840 and 860 may not work during a power failure because they depend on the Wi-Fi network to carry calls. Source: [Integrating Cisco Wireless Phone 840 and 860](https://help.webex.com/en-us/article/ns6xtt2/Integrating-Webex-Wireless-Phone-840-and-860), Notes / warning on power failure. Checked 2026-09-24.
[^9]: The Wireless Phone 800 series supports push-to-talk over multicast when a multicast address is configured. Source: [Cisco Wireless Phone 800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/webex-wireless-phone/datasheet-c78-744461.html), Features table > push-to-talk. Checked 2026-09-24.
[^10]: Cisco Wireless Phone 840 and 860 devices need firmware 1.6 or later to register to Webex Calling, and are provisioned in Control Hub by MAC address. Source: [Integrating Cisco Wireless Phone 840 and 860](https://help.webex.com/en-us/article/ns6xtt2/Integrating-Webex-Wireless-Phone-840-and-860), Prerequisites; Add the phone in Control Hub. Checked 2026-09-24.
[^11]: The Cisco Wireless Phone 840 and 860 are Wi-Fi phones on 2.4 and 5 GHz 802.11 a/b/g/n/ac, not DECT devices. Source: [Cisco Wireless Phone 800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/webex-wireless-phone/datasheet-c78-744461.html), Specifications table > WLAN. Checked 2026-09-24.
[^12]: The 6800 Series operates at 1880 to 1900 MHz in the EU and APAC, and at 1880 to 1900 MHz with reduced power in Australia and New Zealand. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > DECT frequency bands table > EU/APAC and Australia/New Zealand rows. Checked 2026-09-24.
[^13]: The 6800 Series operates at 1910 to 1930 MHz in LATAM and Argentina (reduced power in Chile), 1910 to 1920 MHz in Brazil and Uruguay, and 1880 to 1895 MHz in Taiwan. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > DECT frequency bands table > LATAM, Brazil, Uruguay, Chile, Taiwan rows. Checked 2026-09-24.
[^14]: The 6800 Series operates at 1920 to 1930 MHz in the US and Canada. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > DECT frequency bands table > US/Canada row. Checked 2026-09-24.
[^15]: The 6800 Series base station can be powered by IEEE 802.3 PoE at power class 2 (3.84 to 6.49 W) or by a regional power adapter; the repeater requires a power adapter. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > power requirements. Checked 2026-09-24.
[^16]: A Webex Calling DECT network supports 1000 total lines across all handsets. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Supported base stations / DECT network limits. Checked 2026-09-24.
[^17]: Webex Calling DECT handsets can be assigned to users, workspaces or virtual lines, including numbers from a different Webex Calling location. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Assign handsets section; shared lines across locations note. Checked 2026-09-24.
[^18]: In Control Hub the DBS-110 is listed for single-cell use and the DBS-210 for single, dual and multi-cell networks up to 254 bases. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Supported base stations section. Checked 2026-09-24.
[^19]: In Control Hub, Webex Calling DECT networks are created under Services > Calling > Features > DECT Network by choosing Add New, a location, a network name and a base station model. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Create a DECT network procedure, steps 1-6. Checked 2026-09-24.
[^20]: Control Hub accepts base station MAC addresses up to five at a time when adding bases to a DECT network. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Create a DECT network procedure, add base stations step. Checked 2026-09-24.
[^21]: The Control Hub DECT network procedure orders the steps as: choose location and name, set handset idle screen name, choose DBS-110 or DBS-210, choose the PIN method, add base station MAC addresses, then assign users to handsets. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Create a DECT network procedure, steps 4-9. Checked 2026-09-24.
[^22]: A single Webex Calling DECT network cannot mix DBS-110 and DBS-210 base stations. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Supported base stations section. Checked 2026-09-24.
[^23]: In Webex Calling, each DECT handset can carry up to two lines. Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Assign handsets section. Checked 2026-09-24.
[^24]: The data sheet lists G.711 A-law and mu-law, a G.722-family wideband codec, G.726, G.729 (a and ab) and Opus as supported audio codecs. Source: [Cisco IP DECT 6800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/ip-dect-6800-series-ds.html), Table 3 (multiplatform firmware features) > audio codecs row. Checked 2026-09-24.
[^25]: In a CUCM integration the base station is not added as a CUCM device, and the base station MAC address must not be entered in the handset device's MAC field. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series with Cisco Unified Communications Manager](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_m_dect-with-cucm_map.html), CUCM chapter > add handset as third-party SIP device, MAC address field note. Checked 2026-09-24.
[^26]: With CUCM, the 6800 Series supports only basic features such as making and answering calls, hold, transfer and conference. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series with Cisco Unified Communications Manager](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_m_dect-with-cucm_map.html), CUCM chapter > introduction / supported features. Checked 2026-09-24.
[^27]: For CUCM integration, each handset needs its own CUCM end user with digest credentials that are also entered on the base station web page. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series with Cisco Unified Communications Manager](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_m_dect-with-cucm_map.html), CUCM chapter > end user and base station extension configuration. Checked 2026-09-24.
[^28]: CUCM is a documented but secondary call control option for the 6800 Series: it is absent from the data sheet platform list and the handsets register as generic third-party SIP devices with a basic feature set (inferred). Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series with Cisco Unified Communications Manager](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_m_dect-with-cucm_map.html), CUCM chapter overall; compare data sheet Table 3 platform list. Checked 2026-09-24.
[^29]: For CUCM integration, the base station SIP transport is set to TCP. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series with Cisco Unified Communications Manager](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_m_dect-with-cucm_map.html), CUCM chapter > base station server configuration. Checked 2026-09-24.
[^30]: On Cisco Unified Communications Manager, each Cisco IP DECT 6825 handset is configured as a separate Third-party SIP Device (Advanced). Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series with Cisco Unified Communications Manager](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_m_dect-with-cucm_map.html), Cisco IP DECT 6800 Series with Cisco Unified Communications Manager chapter > handset device configuration. Checked 2026-09-24.
[^31]: The data sheet lists Cisco Webex Calling, Webex Calling Carrier, Cisco BroadWorks, Asterisk and Metaswitch as supported call control platforms. Source: [Cisco IP DECT 6800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/ip-dect-6800-series-ds.html), Table 3 (multiplatform firmware features) > call control platforms. Checked 2026-09-24.
[^32]: A Cisco IP DECT 110 Single-Cell Base Station registers up to 20 handsets. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > handset registration capacity. Checked 2026-09-24.
[^33]: A single Cisco IP DECT 110 Single-Cell Base Station supports up to 6 repeaters. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > repeater section. Checked 2026-09-24.
[^34]: The data sheet rates a single-cell deployment at up to 30 SIP registrations and up to 10 concurrent calls, and a dual-cell DBS-110 deployment at up to 20 concurrent calls. Source: [Cisco IP DECT 6800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/ip-dect-6800-series-ds.html), Table 2 (base station and repeater features) > DBS-110 capacity rows. Checked 2026-09-24.
[^35]: A Cisco IP DECT 210 Multi-Cell Base Station registers up to 30 handsets per base station. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > handset registration capacity. Checked 2026-09-24.
[^36]: A Cisco IP DECT 210 Multi-Cell Base Station supports up to 3 repeaters. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > repeater section. Checked 2026-09-24.
[^37]: The data sheet rates a DBS-210 multi-cell system at up to 1000 SIP registrations and up to 2000 concurrent calls with 254 base stations deployed. Source: [Cisco IP DECT 6800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/ip-dect-6800-series-ds.html), Table 2 (base station and repeater features) > DBS-210 capacity rows. Checked 2026-09-24.
[^38]: Cisco's getting-started sequence is: charge handsets, collect handset IPEI numbers and user data, do a site survey, install and power the base station, let it auto-configure, configure handsets on the base station web page, register handsets, then hand them out. Source: [Get started with your new Cisco IP DECT 6800 series](https://help.webex.com/en-us/article/nq28lbi/Get-Started-with-Your-New-Cisco-IP-DECT-6800-Series), Setup steps list. Checked 2026-09-24.
[^39]: A dual-cell 6800 Series deployment uses two 110 Single-Cell Base Stations; larger multi-cell deployments use 210 Multi-Cell Base Stations. Source: [Cisco IP DECT 6800 Series Administration Guide - Cisco IP DECT 6800 Series (chapter)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_01011.html), Cisco IP DECT 6800 Series chapter > network configurations. Checked 2026-09-24.
[^40]: 47 CFR 15.323(c) requires UPCS devices to monitor the time and spectrum windows they intend to use before transmitting, for at least 10 ms on systems with frame periods of 10 ms or less. Source: [47 CFR 15.323 - Specific requirements for devices operating in the 1920-1930 MHz sub-band](https://www.law.cornell.edu/cfr/text/47/15.323), 47 CFR 15.323(c) and (c)(1). Checked 2026-09-24.
[^41]: US rules require isochronous unlicensed PCS devices under 47 CFR 15.323 to confine operation to the 1920 to 1930 MHz band. Source: [47 CFR 15.323 - Specific requirements for devices operating in the 1920-1930 MHz sub-band](https://www.law.cornell.edu/cfr/text/47/15.323), 47 CFR 15.323(a). Checked 2026-09-24.
[^42]: Handset batteries should be charged for at least 10 hours before first use. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > handset battery / charging. Checked 2026-09-24.
[^43]: Firmware 5.1(3)SR1 has an open caveat, CSCwt67703, in which no audio is heard when G.729 is negotiated on a multicell network. Source: [Cisco IP DECT 6800 Series Release Notes for Firmware Release 5.1(3)SR1](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/firmware/5-1-3/p685_b_cisco-ip-dect-6800-seriesrn513V2.html), Caveats > Open caveats > CSCwt67703. Checked 2026-09-24.
[^44]: A handset is registered to a base station from the handset menu at Connectivity > Register, choosing an empty registration row and entering the access code if prompted. Source: [Get started with your new Cisco IP DECT 6800 series](https://help.webex.com/en-us/article/nq28lbi/Get-Started-with-Your-New-Cisco-IP-DECT-6800-Series), Register the handset section. Checked 2026-09-24.
[^45]: The data sheet rates 6800 Series handsets at 17 hours talk time narrowband, 12 hours wideband, 200 hours idle, with a 6-hour charge time. Source: [Cisco IP DECT 6800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/ip-dect-6800-series-ds.html), Table 1 (handset features) > battery rows. Checked 2026-09-24.
[^46]: The latest 6800 Series firmware listed on Cisco's support page on 2026-09-24 is 5.1(3)SR1, released 7 May 2026. Source: [Cisco IP DECT 6800 Series with Multiplatform Firmware - support series page](https://www.cisco.com/c/en/us/support/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/series.html), Latest release / release notes list. Checked 2026-09-24.
[^47]: The base station's protocol list includes CDP and LLDP alongside DHCP, DNS, NTP, TFTP, HTTP/HTTPS, SIP, RTP/RTCP and SRTP. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > network protocols. Checked 2026-09-24.
[^48]: A multi-cell DBS-210 system supports a maximum of 250 base stations, or 50 base stations plus 100 repeaters (disputed). Source: [Get started with your new Cisco IP DECT 6800 series](https://help.webex.com/en-us/article/nq28lbi/Get-Started-with-Your-New-Cisco-IP-DECT-6800-Series), Multicell / capacity section. Checked 2026-09-24.
[^49]: A DBS-210 multi-cell DECT network supports up to 254 base stations (disputed). Source: [Build and manage digital DECT network in Control Hub](https://help.webex.com/en-US/article/n9c5pu6/Build-and-Manage-Digital-DECT-Network-in-Control-Hub), Supported base stations / DECT network limits. Checked 2026-09-24.
[^50]: Each 6800 Series base station and repeater has a range of up to 50 meters (164 feet) indoors and up to 300 meters (984 feet) outdoors. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > range and coverage. Checked 2026-09-24.
[^51]: The 5.1(3)SR1 release notes list BroadSoft BroadWorks 22.0 and later and Asterisk 13.1 and later as supported systems. Source: [Cisco IP DECT 6800 Series Release Notes for Firmware Release 5.1(3)SR1](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/firmware/5-1-3/p685_b_cisco-ip-dect-6800-seriesrn513V2.html), Supported systems section. Checked 2026-09-24.
[^52]: The 6800 Series DECT RF band is set at the factory per region and cannot be changed by customers. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > DECT frequency bands. Checked 2026-09-24.
[^53]: The data sheet lists CAT-iq 2.1 security support on the air interface, SRTP media encryption and TLS for the 6800 Series. Source: [Cisco IP DECT 6800 Series Data Sheet](https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/ip-dect-6800-series-ds.html), Table 3 (multiplatform firmware features) > security rows. Checked 2026-09-24.
[^54]: Cisco's support page gives the IP DECT 6800 Series release date as 14 January 2019 and listed no end-of-sale or end-of-life notice when accessed on 2026-09-24. Source: [Cisco IP DECT 6800 Series with Multiplatform Firmware - support series page](https://www.cisco.com/c/en/us/support/collaboration-endpoints/ip-dect-6800-series-multiplatform-firmware/series.html), Series overview panel (release date; status). Checked 2026-09-24.
[^55]: The base station fails over to another SIP proxy on RFC 3261 timer expiry, a 5xx response, or TCP disconnection. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > SIP configuration > failover. Checked 2026-09-24.
[^56]: For SIP proxy redundancy the base station supports up to six NAPTR records and twelve SRV records. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > SIP configuration > proxy redundancy. Checked 2026-09-24.
[^57]: The 6800 Series base station supports SIP over UDP, TCP and TLS. Source: [Cisco IP DECT 6800 Series Administration Guide - Technical Details (appendix)](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_appendix_01011.html), Technical Details > SIP configuration. Checked 2026-09-24.
[^58]: Cisco recommends using the site survey tool on the handset to plan base station and repeater placement. Source: [Cisco IP DECT 6800 Series Administration Guide - Hardware Installation](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/adminguide/p685_b_dect-phone-6800-administration-guide/p685_b_dect-phone-6825-administration-guide_chapter_011.html), Hardware Installation > site survey / placement. Checked 2026-09-24.
[^59]: When upgrading 6800 Series firmware, the base station is upgraded first and handsets are upgraded after the base station upgrade completes. Source: [Cisco IP DECT 6800 Series Release Notes for Firmware Release 5.1(3)SR1](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/firmware/5-1-3/p685_b_cisco-ip-dect-6800-seriesrn513V2.html), Upgrade the firmware section. Checked 2026-09-24.
[^60]: Upgrading to 5.1(3)SR1 requires the base stations to already run 5.0(1) or 4.8(1)SR1. Source: [Cisco IP DECT 6800 Series Release Notes for Firmware Release 5.1(3)SR1](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/MPP/6800-DECT/firmware/5-1-3/p685_b_cisco-ip-dect-6800-seriesrn513V2.html), Upgrade the firmware section > prerequisites. Checked 2026-09-24.