When Power Negotiation is disabled on an 8800 phone, the phone can power accessories up to 15.4 W. Cisco recommends leaving Power Negotiation enabled, which is the default, on switches that support it.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco IP Phone 8800 Series
- Subsystem
- PoE
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager - Technical Details — Cisco Systems · tier 2 current vendor documentation · Power and PoE guidance > Power Negotiation
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-power-neg-disabled-15w. WarmTransfer. https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-power-neg-disabled-15w
BibTeX
@misc{warmtransfer-claim-ip-phone-dhcp-vlan-troubleshooting-power-neg-disabled-15w,
title = {Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-power-neg-disabled-15w},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-power-neg-disabled-15w},
note = {Source note ip-phone-dhcp-vlan-troubleshooting-power-neg-disabled-15w, checked 2026-10-02}
}