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

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Step Command Remarks
2. Enter voice view.
voice-setup N/A
3. Configure the timeout interval
for RTP streams.
rtp-detect timeout value
Optional.
By default, the timeout interval for
RTP streams is 120 seconds.
Enabling local call identification
Introduction
As shown in Figure 6, Telephone A originates a call to Telephone B through a SIP server. If the link
between the SIP server and Router B fails, the SIP server forwards the call back to Router A, which then
forwards the call through its FXO interface.
In this case, the call from Telephone A eventually uses two DSP resources. This can be avoided by
enabling the local call identification function, which helps to identify local calls. With this function
enabled in this case, the voice interface corresponding to Telephone A can be directly connected with
the FXO interface, thus saving the DSP resources.
NOTE:
• Whether or not DSP resources can be saved depends on the voice card.
• This function can identify local calls originated by SIP, and cannot identify local calls originated by
H.323.
Figure 5 Network diagram
Configuration procedure
To enable local call identification:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A