TVOICE- Multisite Dial Plan- SRST CUCME and MGCP Fallback Configuration – Part 2

Intro…Once you’ve configured your CUCM server for SRST, it’s time to focus on the router itself. This Nugget dives into IOS-based call-manager-fallback configuration. Topics include base configuration, MGCP fallback, dial-peers, translation-rules, and translation-profiles. 

Base Configuration

call-manager-fallback – Base SRST command!
ip source-address
max-ephones 12 (Licensed and hardware dependant)
max-dn 24 (Licensed and hardware dependant)
*max-dn 24 dual-line
*limit-dn 7970 2 (Limit model of phone to DNs)
keepalive 60

MGCP Fallback Configuration

call application alternate default (12.3 or earlier)
application – ENTER (New way)
service alternate default

Fallback to H.323 Dial-Peers if UCM is unavailable

PSTN Dial Plan

dial-peer voice 9 voip
destination-pattern 9[2-9]………
session target ipv4:
codec g711ulaw

DNIS and ANI Number Modification

Lets prepare the digits to be able to route via the PSTN.

Translation Rule/Profile – See CVOICE!!

TVOICE – Multisite Dial Plan- SRST CUCME and MGCP Fallback Configuration

Intro… The first step in helping your IP Phones defy death is to configure the CUCM server appropriately. In this Nugget, Jeremy discusses the SRST Reference, Device Pool, and Call Forward Unregistered (CFUR) configuration. 

SRST/MGCP Fallback Configuration

CUCM pieces:

  • SRST Reference (Delivered to IP Phone via Device Pool Cfg)
  • Device Pool
  • Call Forward Unregistered (CFUR) – Applied at a LINE level under Call Forward settings.

The Router Pieces:

  • Base Configuration
  • MGCP Fall Configuration
  • PSTN Dial Plan
  • DNIS and ANI Number Modification (CVOICE)
  • COR Lists (CVOICE)