[cisco-voip] CME one-way audio / no audio problems

[Nick Matthews]

1.  It could be codec negotiation (check your dial peers on both
sides), firewalls, or routing issues (make sure both phones have
reachability to each other's IPs directly).
2.   check dial peers for the callforward pattern on router a.  b is
probably returning a full DID and it's routing out the PSTN.  you need
to create a dial peer for this, or at least one more specific.
3.  see 1.

-nick

On Tue, Mar 2, 2010 at 5:46 AM, Alan Su <cj.alan at gmail.com> wrote:
> Dear All,
>
> I have 3 sites running CME (C2800NM-SPSERVICESK9-M), Version 12.4(24)T2),
> each sites have individual ISDN PSTN line connected and use leased-line
> connecting to a hub site. My problems now are:
>
> sample info:
> 1. Site-A with extension A1 & A2, A1 has call forward noans to A2
> 2. Site-B with extension B1 & B2, B1 has call forward noans to B2
> 3. Site-C with extension C1 & C2, C1 has call forward noans to C2
>
> 1. extension A1 call A2, call established successfully, but no audio at all
> 2. extension A1 call B1, if B1 no answer, it'd be forwarded to B2, but A1 is
> using PSTN to call B2 instead using VoIP
> 3. extension C1 call B1, if B1 no answer, it'd be forwarded to B2 and it's
> using VoIP, after B2 pickup, call established successfully but no audio at
> all
>
> It's really weird, I've been checking and googling for a while but couldn't
> find anything helpful.
>
> Thanks a lot~
>
> Regards,
> Alan
>
>
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