R2511-HP MSR Router Series Voice Configuration Guide(V5)

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Call forwarding unavailable
Place a call from Telephone A to Telephone B. The system forwards the call to Telephone C when the
subscriber line of Telephone B is unavailable. Finally, Telephone A and Telephone C start a conversation.
# Enable call forwarding unavailable for the voice subscriber line of Telephone B and forward the call
from Telephone A to Telephone C (3000).
<Sysname> system-view
[Sysname] subscriber-line 2/0
[Sysname-subscriber-line2/0] call-forwarding unavailable enable forward-number 3000
Configuring call transfer
This section describes the procedure for configuring call transfer by using command lines.
Configuration prerequisites
• The router is equipped with an FXS voice interface card.
• The call hold feature is enabled for the voice subscriber line of the call transfer originator.
Configuring call transfer by using command lines
Call transfer is dependent on call hold. Therefore, you must enable call hold before call transfer.
After the recipient receives a transfer request from the originator, no session will be established between
the recipient and the final recipient if the recipient does not support a Refer message, or the final recipient
is busy or fails to answer the call. However, the call between the originator and the recipient can be
re-established.
To enable call transfer and configure the call transfer start delay:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice subscriber line
view.
subscriber-line line-number N/A
3. Enable call transfer.
call-transfer enable
Disabled by default.
This command applies only to the
originator gateway. For the
recipient and final recipient
gateways, the corresponding
functions are enabled.
4. Configure a call transfer start
delay.
call-transfer start-delay number
Optional.
The default is 3 seconds.
Configuration example
Place a call from Telephone A to Telephone B to establish a conversation, then perform a hookflash to put
Telephone B on hold. Place a call from Telephone A to Telephone C, and then hangs up. Now the
conversation between Telephone B and Telephone C is established, and the call transfer by Telephone
A is completed.