Verizon SIP Trunking

See also

Sources

1. 1
   Verizon warns that access to 911 emergency services is unavailable if the customer's access circuit or onsite equipment fails, and asks the customer to ensure the PBX reroutes emergency calls to a backup voice access circuit.

   VoIP Services Welcome Kit · Emergency Service Calling · Checked 2026-10-14
2. 2
   Users can verify their current Dynamic E911 location information by calling the test number 933.

   VoIP Services Welcome Kit · Emergency Service Calling · Checked 2026-10-14
3. 3
   Verizon VoIP Services require Verizon Private IP or Internet Dedicated Services access, with Verizon VoIP for Operator Connect as the stated exception.

   VoIP Services Welcome Kit · LAN/WAN Responsibilities and Design & Order Verification Phase · Checked 2026-10-14
4. 4
   On the Activation Call a Verizon Activation Engineer places test calls using the assigned test DIDs and captures packet traces, which Verizon keeps as a benchmark for later troubleshooting.

   VoIP Services Welcome Kit · Activation Call > Verizon steps · Checked 2026-10-14
5. 5
   Billing for Verizon VoIP Services begins when activation is marked complete, even if some numbers have not yet been ported.

   VoIP Services Welcome Kit · Frequently asked questions · Checked 2026-10-14
6. 6
   In Canada, Verizon's SIP Trunking platform provides Basic 911 on a per-trunk or per-telephone-number basis.

   VoIP Services Welcome Kit · Emergency Service Calling (Canada) · Checked 2026-10-14
7. 7
   Because an uncertified PBX/SBC combination triggers a Verizon VoIP Field Trial during design, confirming certification status should be one of the first turn-up tasks so that the 10-15 business-day design estimate is realistic.inferred

   VoIP Services Welcome Kit · Design & Order Verification Phase · Checked 2026-10-14
8. 8
   In the Design and Order Verification phase, Verizon confirms with the customer whether the customer's solution is certified to interoperate with the Verizon VoIP network.

   VoIP Services Welcome Kit · Design & Order Verification Phase > Verizon steps · Checked 2026-10-14
9. 9
   The customer must configure Verizon's SIP configuration data on its CPE before the Activation Call, after completing the VoIP Services Pre-Activation Checklist.

   VoIP Services Welcome Kit · Service Preparation Phase > Customer steps · Checked 2026-10-14
10. 10
    During Design and Order Verification the customer must provide the WAN/CE router model and software version and the PBX or IP-PBX model and software version.

    VoIP Services Welcome Kit · Design & Order Verification Phase > Customer steps · Checked 2026-10-14
11. 11
    Verizon estimates the Design and Order Verification phase at 10 to 15 business days, and the Service Preparation phase for a basic single-location turn-up with new numbers at 10 business days.

    VoIP Services Welcome Kit · Design & Order Verification Phase; Service Preparation Phase (phase estimates) · Checked 2026-10-14
12. 12
    Customers must apply DSCP markings to VoIP packets before they reach Verizon's network: EF for RTP and AF31 for signaling.

    VoIP Services Welcome Kit · Quality of Service > Customer action · Checked 2026-10-14
13. 13
    According to the welcome kit, Dynamic E911 is currently supported only for Verizon VoIP for Operator Connect, not for IP Trunking delivered to a customer SBC or PBX.

    VoIP Services Welcome Kit · Emergency Service Calling · Checked 2026-10-14
14. 14
    Maintaining accurate 9-1-1 addresses for all US-based locations is a mandatory requirement for Verizon VoIP customers, and the addresses are maintained in the Verizon Integrated Administrative Console (IAC).

    VoIP Services Welcome Kit · Emergency Service Calling · Checked 2026-10-14
15. 15
    Apart from T.38, G.711 is the only codec Verizon supports for fax, and fax machines using G.711 must be configured with error correction turned off.

    VoIP Services Welcome Kit · SIP Interoperability > Fax > G.711 Codec · Checked 2026-10-14
16. 16
    If the customer's solution is not certified to interoperate with the Verizon VoIP network, a Verizon VoIP Field Trial is needed to verify interoperability.

    VoIP Services Welcome Kit · Design & Order Verification Phase > Verizon steps · Checked 2026-10-14
17. 17
    After activation, customers make self-service changes such as call forwarding through the Verizon VoIP Integrated Administrative Console (IAC), reached from the Verizon Enterprise Center.

    VoIP Services Welcome Kit · Post-activation phase; Reporting and tools · Checked 2026-10-14
18. 18
    Internet Dedicated Services customers do not supply private subnets for the SBC nodes; instead, Verizon or the customer's Internet access vendor assigns registered public IP addresses.

    VoIP Services Welcome Kit · Design & Order Verification Phase > Customer steps · Checked 2026-10-14
19. 19
    Verizon markets its VoIP/IP trunking as a full in-country PSTN replacement, including access to emergency services, in almost 40 countries across the Americas, EMEA and APAC.

    IP Trunking Services · Global coverage section · Checked 2026-10-14
20. 20
    In India the customer must not use the IP Trunking Service for emergency calling.

    VoIP Services Welcome Kit · Emergency Service Calling (India) · Checked 2026-10-14
21. 21
    Verizon says it cannot tailor SIP for each customer and documents its SIP requirements in the Retail VoIP Network Interface Specification.

    VoIP Services Welcome Kit · SIP Interoperability · Checked 2026-10-14
22. 22
    Customers using Internet Dedicated Services may need to complete Verizon's IP Justification Form as part of design.

    VoIP Services Welcome Kit · Design & Order Verification Phase > Customer steps; Links (IP Justification Form) · Checked 2026-10-14
23. 23
    Verizon states it requires successful completion of certification testing of an IP PBX platform before confirming the platform works with its VoIP IP Trunking service, because vendor implementations vary and can affect quality and performance.

    IP Trunking Services · WITS 3 VoIP IP Trunking section · Checked 2026-10-14
24. 24
    Emergency service calling over Verizon SIP Trunking is not supported in Japan.

    VoIP Services Welcome Kit · Emergency Service Calling (Japan) · Checked 2026-10-14
25. 25
    Verizon's VoIP Services Welcome Kit defines 'VoIP Services' as IP Trunking (IPT) or IP Integrated Access (IPIA) unless otherwise stated, and says UCCaaS is not covered by the kit.

    VoIP Services Welcome Kit · Overview · Checked 2026-10-14
26. 26
    Verizon's minimum access circuit bandwidth for VoIP Services in the US, Canada, Mexico and LATAM is 768 kbps on Internet Dedicated Services and 384 kbps on Private IP.

    VoIP Services Welcome Kit · Frequently asked questions > minimum access circuit bandwidth · Checked 2026-10-14
27. 27
    The same FAQ gives Europe minimums of 256 kbps on Internet Dedicated Services and 384 kbps on Private IP, and an Asia Pacific minimum of 384 kbps on Private IP.

    VoIP Services Welcome Kit · Frequently asked questions > minimum access circuit bandwidth · Checked 2026-10-14
28. 28
    Verizon may delete numbers that are not handled correctly (that is, numbers that neither terminate nor return a SIP error).

    VoIP Services Welcome Kit · Service Preparation Phase > Customer steps · Checked 2026-10-14
29. 29
    The welcome kit's LAN/WAN Responsibilities section lists customer firewall work covering inbound and outbound SIP signaling packets and setting up the basic NAT function.

    VoIP Services Welcome Kit · LAN/WAN Responsibilities · Checked 2026-10-14
30. 30
    ISDN Fax Group 4 and 64 kbps clear-channel calls are not supported on Verizon VoIP Services.

    VoIP Services Welcome Kit · SIP Interoperability > Fax · Checked 2026-10-14
31. 31
    Verizon describes Verizon VoIP for Operator Connect as essentially Verizon VoIP (its SIP service) delivered over a dedicated peered connection to the customer's Microsoft tenant, with no on-premises equipment required.

    Verizon VoIP for Operator Connect · Frequently asked questions · Checked 2026-10-14
32. 32
    Verizon strongly advises that the customer's PBX administrator and/or third-party vendor attend the Activation Call with the ability to make configuration changes.

    VoIP Services Welcome Kit · Activation Call > Customer steps; Frequently asked questions · Checked 2026-10-14
33. 33
    Verizon recommends scheduling the number port at least three business days after the Activation Call.

    VoIP Services Welcome Kit · Porting Phase · Checked 2026-10-14
34. 34
    The firewall ports and IP addresses the customer must open for Verizon VoIP SIP signaling and RTP are provided in the per-customer Verizon VoIP Technical Letter.

    VoIP Services Welcome Kit · LAN/WAN Responsibilities · Checked 2026-10-14
35. 35
    In the Service Preparation phase Verizon provisions the service and performs Pre-Installation Testing (PIT) before the Activation Call.

    VoIP Services Welcome Kit · Service Preparation Phase > Verizon steps · Checked 2026-10-14
36. 36
    The welcome kit prints the voice port range as 'UDP ports 10000 – 5000', an inverted range that cannot be used as a firewall rule as written; the actual RTP range should be taken from the Technical Letter, not from the kit.inferred

    VoIP Services Welcome Kit · LAN/WAN Responsibilities · Checked 2026-10-14
37. 37
    Private IP customers must provide unused Class C (/24) subnets from their private addressing space for Verizon to use when addressing its SBC nodes.

    VoIP Services Welcome Kit · Design & Order Verification Phase > Customer steps · Checked 2026-10-14
38. 38
    Verizon describes its IP trunking quality-of-service scheme as standards-based on IEEE 802.1p/q.

    IP Trunking Services · WITS 3 VoIP IP Trunking section · Checked 2026-10-14
39. 39
    Verizon states that customer devices should not depend on specific Verizon IP addresses for RTP endpoints.

    VoIP Services Welcome Kit · LAN/WAN Responsibilities · Checked 2026-10-14
40. 40
    An SBC configuration for Verizon IP Trunking cannot be fully specified from public Verizon material alone: the signaling FQDN, media IPs, firewall ports and SIP interface requirements come from per-order data, the Technical Letter and the non-public Network Interface Specification.inferred

    VoIP Services Welcome Kit · Service Preparation Phase; LAN/WAN Responsibilities; SIP Interoperability · Checked 2026-10-14
41. 41
    For a gateway or session border controller, the customer must give Verizon the device model, software version and the WAN-side IP addresses used for SIP trunk termination.

    VoIP Services Welcome Kit · Design & Order Verification Phase > Customer steps · Checked 2026-10-14
42. 42
    Verizon supplies the SIP configuration data, including the Verizon SBC signaling FQDN, the Verizon SBC media IP address(es) and test numbers, when the Activation Call is being scheduled.

    VoIP Services Welcome Kit · Service Preparation Phase > Verizon steps · Checked 2026-10-14
43. 43
    Verizon's welcome kit states that SIP products from different vendors don't always interoperate well with each other because vendors interpret the RFCs differently.

    VoIP Services Welcome Kit · SIP Interoperability · Checked 2026-10-14
44. 44
    The VoIP network availability and time-to-repair SLAs apply only to sites using a qualifying access method; the page names Verizon Internet Dedicated, Verizon Private IP and Microsoft Azure Peering Service, varying by region.

    Voice over IP Service - Service Level Agreement | Verizon · Basis for SLA claim for Network Availability and TTR · Checked 2026-10-14
45. 45
    Verizon's VoIP SLA commits the applicable VoIP network to be available at least 99.99 percent of the time, measured monthly from trouble-ticket time, and Enterprise Trunk Premium raises that commitment to 100 percent.

    Voice over IP Service - Service Level Agreement | Verizon · VoIP Network Availability SLA · Checked 2026-10-14
46. 46
    To claim a VoIP SLA credit the customer must have opened a trouble ticket while experiencing the problem and must submit a written request within 30 business days after the month in which the SLA was missed.

    Voice over IP Service - Service Level Agreement | Verizon · Basis for SLA claim for Network Availability and TTR; Credit Process - General · Checked 2026-10-14
47. 47
    Verizon's VoIP availability and time-to-repair SLAs exclude customer premises equipment, including a customer-provided PBX.

    Voice over IP Service - Service Level Agreement | Verizon · VoIP Network Availability and TTR SLA Exclusions · Checked 2026-10-14
48. 48
    The Verizon VoIP Jitter SLA is not available in LATAM countries, Japan or South Korea.

    Voice over IP Service - Service Level Agreement | Verizon · Jitter SLA · Checked 2026-10-14
49. 49
    Verizon's VoIP SLA sets a Mean Opinion Score floor of 4.0, calculated with the ITU-T G.107 E-model, and a monthly jitter ceiling of 1.0 millisecond.

    Voice over IP Service - Service Level Agreement | Verizon · Mean Opinion Score (MOS) SLA; Jitter SLA · Checked 2026-10-14
50. 50
    A Screened Telephony Number (STN) must be configured on the CPE if the Alternate Caller ID feature was ordered; this applies in the US only.

    VoIP Services Welcome Kit · Service Preparation Phase > Customer steps · Checked 2026-10-14
51. 51
    For T.38 fax on Verizon VoIP, the customer's CPE initiates all T.38 requests, and T.38 can fall back to G.711 when the far end does not support T.38.

    VoIP Services Welcome Kit · SIP Interoperability > Fax > T.38 Codec · Checked 2026-10-14
52. 52
    T.38 support depends on the IP-PBX vendor, and customers must tell their Verizon VoIP Services Solutions Architect if they plan to use T.38.

    VoIP Services Welcome Kit · SIP Interoperability > Fax > T.38 Codec · Checked 2026-10-14
53. 53
    Verizon offers Microsoft Teams calling through Direct Routing, Operator Connect and Teams Phone Mobile, and says customers can mix and match them.

    Verizon VoIP for Operator Connect · Frequently asked questions · Checked 2026-10-14
54. 54
    All native and test numbers must be configured so that calls to them reach a phone, voicemail or announcement, or return a 40X, 5XX or 6XX SIP error; otherwise a call-looping scenario may result.

    VoIP Services Welcome Kit · Service Preparation Phase > Customer steps · Checked 2026-10-14
55. 55
    Verizon highly recommends installing an uninterruptible power supply on site for VoIP Services equipment.

    VoIP Services Welcome Kit · Design & Order Verification Phase > physical requirements · Checked 2026-10-14
56. 56
    H.264 video is available only with applicable CPE, and the customer is responsible for provisioning enough bandwidth for the chosen H.264 profile and level.

    VoIP Services Welcome Kit · Video (only available with applicable CPE) > H264 Codec · Checked 2026-10-14

Documents

Cite this page

WarmTransfer. (2026, October 14). Verizon SIP Trunking. WarmTransfer. https://warmtransfer.net/knowledge/verizon-sip-trunking

@misc{warmtransfer-verizon-sip-trunking,
  title  = {Verizon SIP Trunking},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/verizon-sip-trunking},
  note   = {Verified 2026-10-14}
}