Specifications

Setting Up Call Handling
How to Set Up Call Handling for Incoming and Outgoing Calls
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Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
DETAILED STEPS
Command or Action Purpose
Step 1
call-manager-fallback
Example:
Router(config)# call-manager-fallback
Enters call-manager-fallback configuration mode.
Step 2
alias tag number-pattern to alternate-number
[preference preference-value ] [cfw number
timeout timeout-value ] [huntstop]
Example:
Router(config-cm-fallback)# alias 1 60.. to
5001 preference 1 cfw 2000 timeout 10
Creates a set rules for rerouting calls to sets of phones that
are unavailable during Cisco Unified CallManager
fallback.
• tag—Identifier for alias rule range. The range is from
1 to 50.
• number-pattern—Pattern to match the incoming
telephone number. This pattern may include wildcards.
• to—Connects the tag number pattern to the alternate
number.
• alternate-number—Alternate telephone number to
route incoming calls to match the number pattern. The
alternate number has to be a specific extension that
belongs to an IP phone that is actively registered on the
Cisco Unified SRST router. The alternate telephone
number can be used in multiple alias commands.
• preference preference-value—(Optional) Assigns a
dial-peer preference value to the alias. The preference
value of the associated dial peer is from 0 to 10. Use
with the max-dn command.
• cfw number—(Optional) The cfw keyword allows
users to set call forward busy and call forward no
answer to a set string and override globally configured
call forward settings.
• timeout timeout-value—(Optional) Sets the ring
no-answer timeout duration for call forwarding, in
seconds. Range is from 3 to 60000.
• huntstop—(Optional) Stops call hunting after trying
the alternate number.
Step 3
max-dn max-directory-numbers [dual-line]
[preference
preference-order ]
Example:
Router(config-cm-fallback)# max-dn 10
preference 2
Sets the maximum possible number of directory numbers
or virtual voice ports that can be supported by a router and
sets the global preference for creating the VoIP dial peers
for all directory numbers that are associated with the
primary number.
• Using the max-dn command sets the preference for the
default dial peers created with the alias command.
• When configuring call rerouting, set the max-dn
preference to a higher numeric preference than the
preference that was set with the alias command.