RE: sip trunk

I understand that when we use MTP we cannot use G729, is it correct and why ?

thanks

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Nick Matthews
Sent: Friday, December 03, 2010 12:49 AM
To: Asim Zafar
Cc: Ryan West; Cisco certification
Subject: Re: sip trunk

Without CUBE you will have to NAT all of your private IPs from your
phones/CUCM. Alternatively you could put a MTP in a DMZ. Both of these
solutions are far from optimal because the NAT option requires for your
firewall to keep up with SIP traffic/standards (historically terrible) or
for you to put an internal CUCM component reachable from the internet (not a
fantastic idea either). CUCM 5.1 is also not very good at SIP, so there's a
good chance you'll run into problems. Your provider will require early
offer, which will require an MTP on CUCM, which will mean all calls will be
G.711. I would confirm your MTP resources to make sure that's alright.

So yes, you really should be using a CUBE here.

-nick

On Thu, Dec 2, 2010 at 1:03 PM, Asim Zafar <asim.mz_at_gmail.com> wrote:

> Dear Ryan,
>
>
> Thanks for you reply.
>
>
> Is it necessary to use CUBE or just a best practice. Can i achieve all
> the requirements without CUBE.
>
>
> Best regards,
> Asim Zafar
>
> On Thu, Dec 2, 2010 at 5:00 PM, Ryan West <rwest_at_zyedge.com> wrote:
> > Asim,
> >
> > I would read through this document which outlines a majority of the
> concerns.
> >
> >
> http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00808b6ca6.shtml
> >
> > With 5.1 I would recommend connecting your CM to CUBE and having it deal
> with the SIP trunk.
> >
> > -ryan
> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Asim Zafar
> > Sent: Thursday, December 02, 2010 1:57 AM
> > To: Cisco certification
> > Subject: sip trunk
> >
> > Dear experts,
> >
> >
> > I need to connect my CUCM 5.1 with sip proxy on telco side.IP phones will
> connect to CUCM.
> > The SIP server provide 90 lines with real numbers
> >
> >
> > Following is the scenario.
> >
> > Cisco IP phones----------CUCM-------WAN connection to telco---------SIP
> proxy server.
> >
> > Can anybody explain me how this will work, what will be the
> configurations and if CUCM has the capability to control the calls between
> IP phones and SIP server.
> >
> >
> > --
> > Thanks & Regards,
> >
> > Asim Zafar
> >
> >
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> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
> --
> Thanks & Regards,
>
> Asim Zafar
>
>
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>
> _______________________________________________________________________
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Received on Fri Dec 03 2010 - 16:05:42 ART