[cisco-voip] No Ringing on Some outbound Calls - at&t ipFlex

[Peter Slow]

so can we see some SIP debugs? =)

On Tue, Jun 3, 2014 at 4:04 PM, Matthew Loraditch
<MLoraditch at heliontechnologies.com> wrote:
> Thanks everyone. I am somewhat familiar with all of this, but the refresher
> in the finer details helps.
>
>
>
>
>
> Matthew G. Loraditch – CCNP-Voice, CCNA-R&S, CCDA
>
> 1965 Greenspring Drive
> Timonium, MD 21093
>
> direct voice. 443.541.1518
> fax.  410.252.9284
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> From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of
> Brian Meade
> Sent: Tuesday, June 03, 2014 3:51 PM
> To: Peter Slow
> Cc: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] No Ringing on Some outbound Calls - at&t ipFlex
>
>
>
> Correct, it's the PortReq SCCP message and PortRes return message that is
> used for this.
>
>
>
> On Tue, Jun 3, 2014 at 3:22 PM, Peter Slow <peter.slow at gmail.com> wrote:
>
> most skinny endpoints running newish software support early offer
> using the sccp getport message, fyi.
>
>
> On Tue, Jun 3, 2014 at 2:10 PM, Amit Kumar <amit3.kum at gmail.com> wrote:
>> Here are my two cents.
>>
>> Skinny endpoint mostly do an delayed offer, unless we force on sip trunk
>> to
>> do an an early offer ( mtp if needed ). as everyone said, ringback
>> behavior
>> changes from call manager, as per what we get from called party.
>>
>> 180 ringing without SDP - > Ringback needs to be generated locally.
>> 180 / 183 with SDP - > Called party is going to play ringback for us. We
>> just need to establish media by that time ( Similar to what we see in
>> ISDN,
>> when we get alerting with an PI of 3 or 8 ). In case of delayed offer,
>> PRACK
>> is really an solution to look forward to have media established
>> beforehand.
>>
>>
>>
>>
>> On Tue, Jun 3, 2014 at 10:50 PM, Brian Meade <bmeade90 at vt.edu> wrote:
>>>
>>> Definitely at least need the "debug ccsip messages" for one of the calls.
>>> We'll need to see if AT&T is sending a 180 Ringing or if they're sending
>>> a
>>> 183 Session Progress w/ SDP to play the ringback inband.  If they're
>>> sending
>>> a 183 Session Progress, make sure the SIP Profile on the SIP Trunk has
>>> the
>>> Rel1XX Options set to Send Prack if 18X contains SDP.
>>>
>>>
>>> On Tue, Jun 3, 2014 at 12:43 PM, Matthew Loraditch
>>> <MLoraditch at heliontechnologies.com> wrote:
>>>>
>>>> We are having a regular but not always issue with a client, where they
>>>> are not hearing the ringing when dialing outbound on calls. These are
>>>> SCCP
>>>> 6945s to UCM 9.1.2 SIP Trunked to CUBE and then handoff to at&t’s ipFlex
>>>> service.
>>>>
>>>> If anyone has some suggestions to look at before I spend time with TAC
>>>> it
>>>> would be appreciated!
>>>>
>>>> Thanks!
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Matthew G. Loraditch – CCNP-Voice, CCNA-R&S, CCDA
>>>>
>>>> 1965 Greenspring Drive
>>>> Timonium, MD 21093
>>>>
>>>> direct voice. 443.541.1518
>>>> fax.  410.252.9284
>>>>
>>>> Twitter  |  Facebook  | Website  |  Email Support
>>>>
>>>> Support Phone. 410.252.8830
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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