[cisco-voip] Media Termination Point

[Jason Burns]

To add to that:

On your H.323 GW you need to add

ccm-manager music-on-hold

(yes - even if it's an H.323 GW. I don't know why this works, but I've used
it successfully before)

Sometimes you'll also need to add

ip multicast-routing

to the config as well.

Then when you put the PSTN leg on hold you can run

show ccm-manager music-on-hold

and check out the multicast stream packet count.

show ip mroute count

is also useful there.

On Tue, Nov 18, 2008 at 6:50 PM, Peter Slow <peter.slow at gmail.com> wrote:

> Andre,
>  Multicast MoH is not supported with MTPs or transcoders. CCM
> probably allocated a unicast stream for your MTP.  when you placed the
> PSTN leg of the call on hold and were usign an MTP, you got around
> whatever was causing your Multicast MoH not to work by causing CCM to
> use unicast. silence on hold indicates that the multicast RTP wasn't
> makign it to the destination gateway, or that there was a
> configuration problem on that gateway.
>
> On Tue, Nov 18, 2008 at 9:47 AM, Andre Beck <cisco-voip at ibh.net> wrote:
> > Hi,
> >
> > On Tue, Nov 04, 2008 at 03:42:19PM +0100, Tim Smith wrote:
> >>
> >> You would not typically require an MTP with a 2800 series gateway. It
> will
> >> support all the functions natively.
> >>
> >> So in short, your VAR has most likely done the right thing. Modern
> gateway
> >> in standard setup should not require an MTP. To be sure keep an eye on
> RTMT
> >> alerts / logs for increased Media resource list exhausted events though.
> >
> > I repeatedly stumbled over a certain situation where not having an MTP
> > actually leads to a problem even with only Cisco C(U)CM and Cisco
> gateways
> > involved. That is when
> >
> > * The CCM and Gateway are connected via H.323 (either as a simple gateway
> >  or by mediation of a gatekeeper) and
> > * Multicast MoH is configured.
> >
> > In this situation, the PSTN side of a call will not hear MoH but just
> > receive silence unless the H.323 gateway is supplied with an MTP on the
> > CCM side.
> >
> > I've seen this with 4.1.x and 5.x so far. With 5.x I had stability issues
> > with the MTP stuff and disabled both MMoH and MTPs to get rid of it. A
> year
> > of patches later, maybe I should retry this.
> >
> > For more information, just scan back in this mailing list (archives), I
> > think I posted more detailed versions of my MTP issues here.
> >
> > HTH,
> > Andre.
> > --
> >   Real men don't make backups of their mail. They just send it out
> >    on the Internet and let the secret services do the hard work.
> >
> > -> Andre Beck    +++ ABP-RIPE +++      IBH IT-Service GmbH, Dresden <-
> > _______________________________________________
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> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
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