Cisco CP-7911G-CH1 System Administrator Manual page 167

Configuring Call Handling
In a typical Cisco Unified SIP SRST setup, the call-forward b2bua mailbox command is not used;
however, it is likely to be used in a Cisco Unified SIP Communications Manager Express (CME)
environment. Detailed procedures for configuring the call-forward b2bua mailbox command are found
in the
SUMMARY STEPS
1.
2.
3.
4.
5.
6.
7.
8.
DETAILED STEPS
Command or Action
Step 1
enable
Example:
Router> enable
Step 2
configure terminal
Example:
Router# configure terminal
Step 3
voice register pool tag
Example:
Router(config)# voice register pool 15
Step 4
call-forward b2bua all directory-number
Example:
Router(config-register-pool)# call-forward
b2bua all 5005
Step 5
call-forward b2bua busy directory-number
Example:
Router(config-register-pool)# call-forward
b2bua busy 5006
OL-13143-04
Cisco Unified Communications Manager (CallManager)
enable
configure terminal
voice register pool tag
call-forward b2bua all directory-number
call-forward b2bua busy directory-number
call-forward b2bua mailbox directory-number
call-forward b2bua noan directory-number timeout seconds
end
documentation on Cisco.com.
Purpose
Enables privileged EXEC mode.
Enter your password if prompted.
•
Enters global configuration mode.
Enters voice register pool configuration mode.
Use this command to control which phone registrations
•
are accepted or rejected by a Cisco Unified SIP SRST
device.
Enables call forwarding for a SIP back-to-back user agent
(B2BUA) so that all incoming calls are forwarded to
another non-SIP station extension (that is, SIP trunk, H.323
trunk, SCCP device or analog/digital trunk).
directory-number: Telephone number to which calls are
•
forwarded. Represents a fully qualified E.164 number. 
Maximum length of the telephone number is 32.
Enables call forwarding for a SIP B2BUA so that incoming
calls to a busy extension are forwarded to another extension.
directory-number: Telephone number to which calls are
•
forwarded. Represents a fully qualified E.164 number.
Maximum length of the telephone number is 32.
Cisco Unified SCCP and SIP SRST System Administrator Guide
How to Configure Cisco Unified SIP SRST
167