UC trunking integration guide

Publisher

Bandwidth

URL

https://www.bandwidth.com/support/en/articles/12822954-uc-trunking-integration-guide

Published

2025-11-17

Updated

unknown

Accessed

2026-09-30

HTTP status

200

License

proprietary; Bandwidth support site terms; no-redistribution; short excerpts and locators only

Source notes citing this source

• For outbound caller ID on the voice trunk Bandwidth reads the From field, a Remote-Party-ID header takes precedence when present, P-Asserted-Identity and Privacy headers are also supported, and the number must be in E.164 format. in context
• Bandwidth's UC trunking guide specifies E.164 number format with a leading plus sign, for example +19192971100. in context
• Bandwidth's integration guides do not publish the trunk proxy IP addresses; the customer obtains them from their Bandwidth Implementation Specialist or Bandwidth Support. in context
• Bandwidth presents a mated pair of signaling proxies: the customer must allow inbound signaling from both addresses, because a call may arrive from either, and must configure both as outbound targets so calls continue if one is offline. in context
• Bandwidth UC trunking does not support SIP registration; the customer must present public static IP addresses. in context
• Bandwidth's UC trunking guide lists G.711 u-law and G.729a as fully supported codecs and iLBC as supported inbound only. in context
• For the voice trunk, UDP port 5060 must be open for SIP signaling and UDP ports 1024 to 65534 must be open, statically or dynamically through an ALG, for audio. in context
• Bandwidth signals from a mated pair of SIP proxies, so customers must allow both proxy IPs for origination and configure both for termination traffic. in context
• Bandwidth UC Trunking does not support SIP REGISTER; the customer must provide a public static IP address for Bandwidth to send calls to. in context

Cite this source record

APA

WarmTransfer. (2025, November 17). UC trunking integration guide. WarmTransfer. https://warmtransfer.net/knowledge/sources/bandwidth-support-uc-trunking-integration-guide

BibTeX

@misc{warmtransfer-bandwidth-support-uc-trunking-integration-guide,
  title  = {UC trunking integration guide},
  author = {{WarmTransfer}},
  year   = {2025},
  url    = {https://warmtransfer.net/knowledge/sources/bandwidth-support-uc-trunking-integration-guide},
  note   = {Bandwidth, accessed 2026-09-30}
}