Cisco Expressway Administrator Guide (X15.2) - Dial Plan and Call Processing

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/admin_guide/X15-2/exwy_b_cisco-expressway-administrator-guide-x152/exwy_m_dial-plan-and-call-processing.html

Published

unknown

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco website terms of use; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• If the target domain publishes no NAPTR records, the Expressway uses a default list of _sips._tcp, _sip._tcp and _sip._udp SRV queries for that domain. in context
• In Expressway X15.2, hop counts can be set from 1 to 255 (default 15), are decremented by one on each forward, set the Max-Forwards field for SIP, and the search fails when the count reaches zero. in context
• The Expressway X15.2 guide advises setting Call loop detection mode to On so that search requests do not circulate unnecessarily when hop counts are higher than needed. in context
• Expressway detects circular references in its dial plan (an alias transformed and later transformed back) and ends that search branch with a 'policy loop detected' error. in context

Cite this source record

APA

WarmTransfer. (2026, September 25). Cisco Expressway Administrator Guide (X15.2) - Dial Plan and Call Processing. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-exwy-admin-x152-dial-plan

BibTeX

@misc{warmtransfer-cisco-exwy-admin-x152-dial-plan,
  title  = {Cisco Expressway Administrator Guide (X15.2) - Dial Plan and Call Processing},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-exwy-admin-x152-dial-plan},
  note   = {Cisco Systems, accessed 2026-09-25}
}