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The station changed over to SIP and we connect our phone lines to a Cisco VG310 that was to provide the diletone. Well the call would come in and then hang up in 2 sec. dial tone.

Now whenever a call comes in and the system would hang up after 2 sec.

Solution :

We set vg310(config-voiceport)#loop-length long and that fixed the problem. By default the Cisco VG310 is set to loop short.

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The following configuration shows the use of the loop-length command:

vg350#config t

Enter configuration commands, one per line. End with CNTL/Z.

vg350(config)#voice-port 2/0/0

vg350(config-voiceport)#loop-length ?

long long loop length

short short loop length

vg350(config-voiceport)#loop-length long

vg350(config-voiceport)#shut

vg350(config-voiceport)#no shut

vg350(config-voiceport)#

*Mar 21 21:19:17.790: %LINK-3-UPDOWN: Interface Foreign Exchange Station 2/0/0, changed state to Administrative Shutdown

*Mar 21 21:19:19.094: %LINK-3-UPDOWN: Interface Foreign Exchange Station 2/0/0, changed state to up

vg350(config-voiceport)#

default to loop-length short.

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