Hi everybody,
I need assistance on the VoIP problem I am facing :
We are planning to have a VoIP setup on the already
existing data link between our local and remote
office.
Both sites have Cisco 3640 routers configured for it.
The router on the local site has IOS 11.3(9)T and the
remote router has 12.0(5)T1 on it.
Is it necessary for the routers at both ends be
running a similar version of IOS for the Voice calls
to be successful. What kind of upgrade is required?
Secondly the loopback test (hairpinning) was
successful for the local site but a similar test at
the remote site was unsuccessful.
Could that be due to any signalling problems ?
Thanks & Regards
Amit
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