[cisco-voip] software MTP's

[Roger Wiklund]

Sorry, EO is early offer.

Most ITSPs require you to send the codec information in the first
invite (early offer), that way they control the supported codecs.
With delayed offer no codec information is sent in the first invite,
instead the ITSP send you the codec information in the session
progress(I think), and thus you control the supported codecs.

By default delayed offer is configured in the CUCM. Best practice is
to use the CUBE to send EO to the ITSP. CUCM-DO->CUBE-EO->ITSP.
That way you need no MTP at all.

If you are forced to run Early Offer on the Callmanager itself, older
versions required an MTP. However, starting with 8.5 you can actually
send Early Offer directly from the Callmanager without invoking an MTP
if the SCCP/SIP endpoints are new enough.

I wrote a note about this on my blog. (Ignore the flow-around stuff)

http://wiklunds.wordpress.com/2012/01/02/sip-delayed-offer-to-early-offer-with-rtp-flow-around-support-in-cube-8-6/

Hope that helps.

/Roger



On Tue, Jul 10, 2012 at 9:20 PM, Leslie Meade <Leslie.Meade at lvs1.com> wrote:
> Sorry do not know what you mean by eo
>
> But the calls foot a cube then to the provider sbc
>
> We are running 8.6
>
>
>
> Sent from my iPhone
>
> On Jul 10, 2012, at 12:00 PM, "Roger Wiklund" <roger.wiklund at gmail.com> wrote:
>
>> I mean SIP EO.
>> What CUCM version are you running?
>>
>> /Roger
>>
>> On Tue, Jul 10, 2012 at 8:52 PM, Roger Wiklund <roger.wiklund at gmail.com> wrote:
>>> Hey
>>>
>>> What are you using the MTP for? SIP DO-EO?
>>>
>>> Regards
>>> Roger
>>>
>>> On Tue, Jul 10, 2012 at 6:11 PM, Leslie Meade <Leslie.Meade at lvs1.com> wrote:
>>>> Question about IOS MTP’s
>>>>
>>>> We had an issue with SIP calls and Cisco removed the G711u codec out of the
>>>> profile.
>>>>
>>>> I always though you must have one? So how does the MTP work without a codec
>>>> ?
>>>>
>>>>
>>>>
>>>> dspfarm profile 1 mtp
>>>>
>>>> codec pass-through
>>>>
>>>> maximum sessions software 100
>>>>
>>>> associate application SCCP
>>>>
>>>>
>>>>
>>>> Cheers
>>>>
>>>>
>>>>
>>>> Leslie
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>>