Voice

[sourajit01]

Is it necessary that the same circuit is to be used for incoming and outgoing calls both? 

How to check which circuit is being used for incoming and outgoing calls?

[balaji.bandi]

What kind of Circuti ? E1 ? check the configuration how it configured.

Some Organisation they User 1E1 for incoming, 1 for outgoing, depends on requirement.

[HARIS_HUSSAIN]

Do you have PRI or FXO Lines? Use below commands

FOR PRI
=========
show isdn Active
show isdn status

OR
Show voice-port summary
&
show voice call status
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Thanks,
Haris