[cisco-voip] SBC and M-MOH

[Ki Wi]

Hi Folks,
In the past, most sites will have a PSTN voice gateway. MMOH will be used
for the users co-locating with a PSTN voice gateway.

Now, more and more providers in Europe/US/Canada are providing SIP trunk
now.
As we know, certain music will tend to be distorted when we used G.729.

When we move over to SIP trunk, what's the best design for MOH for various
scenario?

Scenario 1
Local voice gateway is available (acting as SBC). Preferably, MMOH will be
playback for local user and PSTN users.

Is there any special CUBE configuration to convert MMOH playback locally to
unicast MOH traffic before sending to SIP provider? Or I can only unicast
MOH from CUCM and send it towards the SIP provider?

Scenario 2
Site without voice gateway. The service provider SBC can directly integrate
with CUCM via SIP trunk.  SBC (1 leg - connected to PSTN service provider
network, 1 leg - connected to customer LAN) and CUCM sits in different
site. In this case, how can I provide MOH to the SIP trunk provider?
Unicast via G.711?
Is there better option out there? I feels that in this case, it's wasting
of bandwidth when all my regular on-net calls are using G.729 only.

-- 
Regards,
Ki Wi
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