Hi,
until 12.0.5T the codec G729r8 was pre-IETF standard, from 12.0.5T the codec
was standardized and the 2 codec are incompatible (different bit ordering)
you must use the command "codec g729r8 pre-ietf" for interoperability but
there are some negotiation problem (rink back tone for example).
You must consider from 12.0.7T there are many new function very useful
(codec, timing and debugging for example).
My opinion check for 12.1.x because 12.0.7T reached the End of Engeneering
so no more development are planned for this release.
Check for memory.
Stefano
> -----Original Message-----
> From: Amit Gupta [mailto:[EMAIL PROTECTED]]
> Sent: gioved� 28 dicembre 2000 06.44
> To: [EMAIL PROTECTED]
> Subject: Voice Over IP
>
>
> 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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