Cisco CP-7911G-CH1 System Administrator Manual page 149

Configuring Call Handling
Prerequisites
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Restrictions
H.450.12 Supplementary Services Capabilities exchange among routers is not implemented.
SUMMARY STEPS
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OL-13143-04
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
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Cisco SRST 3.0
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call-manager-fallback
call-forward pattern pattern (call forward only)
transfer-system {blind | full-blind | full-consult | local-consult} (call transfer only)
transfer-pattern transfer-pattern (call transfer only)
exit
voice service voip
h323
h450 h450-2 timeout {T1 | T2 | T3 | T4} milliseconds
end
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