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
Prerequisites
• Call transfer with consultation is available only when a second line or call instance is supported by
the IP phone. Please see the dual-line keyword in the max-dn command.
• All voice gateway routers in the VoIP network must support the H.450 standard.
• All voice gateway routers in the VoIP network must be running the following software:
– Cisco IOS Release 12.3(2)T or a later release
– Cisco SRST 3.0
Restrictions
H.450.12 Supplementary Services Capabilities exchange among routers is not implemented.
SUMMARY STEPS
1. call-manager-fallback
2. call-forward pattern pattern (call forward only)
3. transfer-system {blind | full-blind | full-consult | local-consult} (call transfer only)
4. transfer-pattern transfer-pattern (call transfer only)
5. exit
6. voice service voip
7. h323
8. h450 h450-2 timeout {T1 | T2 | T3 | T4} milliseconds
9. end
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
call-forward pattern pattern
Example:
Router(config-cm-fallback)# call-forward
pattern 4...
Specifies the H.450.3 standard for call forwarding.
• pattern—Digits to match for call forwarding using the
H.450.3 standard. If an incoming calling-party number
matches the pattern, it can be forwarded using the
H.450.3 standard. A pattern of .T forwards all calling
parties using the H.450.3 standard.