Troubleshooting Guide for Cisco Unified Communications Manager, Release 12.5(1) - Dial Plans and Routing Issues

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/trouble/12_5_1/cucm_b_troubleshooting-guide-1251/cucm_b_troubleshooting-guide-1251_chapter_0101.html

Published

2023-11-24

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Cisco's troubleshooting guide advises waiting at least 10 seconds after the last digit when testing, because the call may be waiting for the interdigit timer to expire. in context
• In Cisco's troubleshooting case where the dialed number matched no pattern in any partition the caller's CSS could reach, the phone received reorder tone. in context
• An item not assigned to any partition is in the Null (default) partition, every user can call it, and the system always searches the Null partition last. in context
• Partition order in a CSS therefore does not make a less specific pattern in an earlier partition win over a more specific pattern in a later one; order decides only between equally good matches. inferred in context
• If two patterns match the dialed digits equally well, digit analysis chooses the one in the partition listed first in the calling search space. in context
• Cisco documentation from 4.0(1) and 12.5(1) consistently says partition order only breaks ties between equally specific matches, so the same closest-match behaviour very likely applies in Unified CM 15. This run found no Release 15 document that states it. inferred in context
• The Unified CM 12.5(1) troubleshooting guide advises that callers may need to wait at least 10 seconds after the last digit for the interdigit timer to expire when overlapping patterns exist. in context
• In Unified CM 12.5(1), a call from a line whose CSS differs from its phone's CSS searches the partitions of both calling search spaces. in context
• In Unified CM 12.5(1), when two patterns match the dialed digits equally well, digit analysis chooses the pattern whose partition is listed first in the calling search space. in context

Cite this source record

APA

WarmTransfer. (2023, November 24). Troubleshooting Guide for Cisco Unified Communications Manager, Release 12.5(1) - Dial Plans and Routing Issues. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-troubleshooting-1251-dial-plan

BibTeX

@misc{warmtransfer-cisco-cucm-troubleshooting-1251-dial-plan,
  title  = {Troubleshooting Guide for Cisco Unified Communications Manager, Release 12.5(1) - Dial Plans and Routing Issues},
  author = {{WarmTransfer}},
  year   = {2023},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-troubleshooting-1251-dial-plan},
  note   = {Cisco Systems, accessed 2026-09-24}
}