Information Technology Reference
In-Depth Information
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local-consult:
This also uses the H.450.2 standard for call transfer. This method is used only for local transfers, and calls are
transferred with the transferor first connecting to the destination. Two lines are required for this type of call transfer, and calls
fall back to the
blind
method for nonlocal consultation or nonlocal transfer target.
Note that the
dual-line
keyword can be used with the
max-dn
command to set all IP phones to one virtual port with two channels.
(This can be useful if phones do not have two lines.) This command can be used to allow call transfer, call waiting, and conferencing
by allowing two calls to occur simultaneously on one line.
The following is an example of the configuration of call transfer on an SRST router:
call-manager-fallback
transfer-pattern
1234…
transfer-system full-consult
The configuration in the example allows call transfer to destinations matching the pattern 1234.... using the
full-consult
method,
where each dot represents a single digit from 0 to 9.
Call Forwarding
As with call transfer, call forwarding is enabled by default between Cisco IP phones that are registered with an SRST router. To
enable H.450.3 call forwarding for nonlocal numbers, you must configure the
call-forward pattern
pattern
command.
For example, the
call-forward pattern .T
command forwards all calls using H.450.3. (The pattern in this example matches all calling
party numbers.) This means that if a directory number has forwarded its calls and an incoming call matches that number, an H.450.3
response is sent back to the calling party to ask that the call be placed again using the forward-to destination.
Other call forwarding commands include
call-forward busy
and
call-forward noan
, which were explained in the previous section.
Dial Plan Considerations
When Cisco IP phones register with the SRST router, the router associates the phones with a virtual dial peer, and this allows the
locally registered phones to call each other. But, the
dialplan-pattern
tag
pattern
extension-length
length
command will probably be
