With multiple phone system integrations, a phone system trunk (Telephony Integrations > Trunk) with a Trunk Access Code lets Unity Connection transfer calls to extensions on another phone system.

Checked 2026-09-25

the extra digits that Unity Connection must dial to transfer calls through the gateway to extensions on the previously existing phone system
Vendor
Cisco
Product
Cisco Unity Connection
Subsystem
multiple phone system integration
Deployment
on-premises
Region
not restricted
Release range
Unity Connection 15
Checked
2026-09-25

Sources

Cite this note

APA

WarmTransfer. (2026, September 25). Integrating Unity Connection with Unified CM: source note unity-connection-cucm-integration-setup-phone-sys-trunk. WarmTransfer. https://warmtransfer.net/knowledge/claims/unity-connection-cucm-integration-setup-phone-sys-trunk

BibTeX

@misc{warmtransfer-claim-unity-connection-cucm-integration-setup-phone-sys-trunk,
  title  = {Integrating Unity Connection with Unified CM: source note unity-connection-cucm-integration-setup-phone-sys-trunk},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/unity-connection-cucm-integration-setup-phone-sys-trunk},
  note   = {Source note unity-connection-cucm-integration-setup-phone-sys-trunk, checked 2026-09-25}
}

Read in context