T2 · T2-R02
Route patterns, lists, and groups
Learn it in 5 minutes
- A route pattern matches digits.
- A route list holds route groups in order.
- A route group holds gateways or trunks.
- Distribution inside the group is its own setting.
- A pattern pointed at a gateway skips the list.
Visual
What is going on
When the PSTN call fails over, you are usually looking at the route list order and whether the first member sent a release cause that CUCM is willing to hunt on. Not every failure hunts.
Worked example
Pattern 9.! sends national calls to a route list. Group 1 is the primary SIP trunk. Group 2 is the backup. A 503 from the first trunk can hunt. A fast busy from a downstream reason may not. Read the cause.
Quiz
1. A route group is a list of partitions.
False. It is a list of gateways or trunks.
Ecosystem
Sister pieces sit on the ecosystem page: the glossary, the mind map, the integration map, and the sibling labs.
- Route pattern — Digits in a partition that point at a gateway or route list.
- Route list — An ordered set of route groups.
Config. Name the pattern, the list, the group, and the member before you change hunting.
Troubleshooting. If only some calls fail, compare the digit string with the pattern, not the trunk status alone.
Bridge. A Webex Calling route group is a different object. Say which product you mean.
Mind map, sister technologies, and future hooks live on the ecosystem page.
Sources
Product screens move. Confirm the guide for your release before you change a live system.
Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- Cisco. Cisco Unified Communications Manager product support last checked 2026-10
- Cisco. System Configuration Guide for CUCM, Release 15 last checked 2026-10
- Cisco. Cisco Collaboration Preferred Architectures last checked 2026-10
- Cisco. Preferred Architecture for Cisco Collaboration 15, design overview (PDF) last checked 2026-10
- Protocol and ports. CUCM 15 TCP and UDP port usage last checked 2026-10
- Protocol and ports. IANA SIP parameters last checked 2026-10
- Community. Cisco Community, Collaboration knowledge base last checked 2026-10
- Wikipedia. Voice over IP (Wikipedia) last checked 2026-10
- Wikipedia. CUCM (Wikipedia disambiguation) last checked 2026-10
- Cisco. Collaboration 12 SRND book. confirm. The historical Collaboration 12 SRND path opened as a product listing, not the design book. Use the Preferred Architecture index, which was opened. last checked 2026-10
- Wikipedia. English Wikipedia article for Cisco Unified Communications Manager. confirm. That title returned HTTP 404. The CUCM disambiguation page is the Wikipedia page that opened. last checked 2026-10