[asterisk-biz] Sprint via L3 problems: no DTMF

[Douglas Garstang]

We received this from Level 3 last week. If they've done it already,
then they are early!

" Dear Level 3 Customer, 
Level 3 will be upgrading gateway media servers and initial feasibility
tests have shown that Asterisk software versions prior to 1.4 are not
compatible with RFC specifications. The issue relates specifically to
Asterisk's support for Dual-Tone Multi-Frequency (DTMF) named events
(RFC 2833). 

Asterisk software prior to version 1.4 does not send "duration" in the
actual DTMF Event packet. This violation of RFC 2833, as described in
sections 3.5 (Payload Format) and 3.6 (Sending Event Packets), causes
call failures on Level 3's network. 

However, this is a known issue which has been resolved by Asterisk
beginning 
with their code release 1.4. 

For customers using earlier version of Asterisk, you will need to
upgrade your Asterisk software to version 1.4 or higher by August 1,
2007 in order to prevent disruptions to your service. Failure to upgrade
your network will result in DTMF detection failures beginning August 1,
2007, may negatively impact your calling traffic over the Level 3
network. 

In-band DTMF detection will continue to function properly on Level 3's
network and can be used as an alternative to the software upgrade. 

Level 3 provides this notification more than 45 days in advance of the
network GCR so that customers have adequate time to upgrade their
software. 

If you have questions or concerns about this letter please contact the
Level 3 Service Management Center at 1-877-453-8353 option 4 followed by
option 3. 
We appreciate your business and apologize for any inconvenience this may

cause you."

Douglas.


> -----Original Message-----
> From: asterisk-biz-bounces at lists.digium.com [mailto:asterisk-biz-
> bounces at lists.digium.com] On Behalf Of Peter Beckman
> Sent: Friday, July 20, 2007 12:30 PM
> To: asterisk-biz at lists.digium.com
> Subject: [asterisk-biz] Sprint via L3 problems: no DTMF
> 
> Folks --
> 
> I'm troubleshooting a strange issue.
> 
> Asterisk 1.2.13 -> Vitelity -> L3 -> Sprint Mobile Phone 703-867
> 
> DTMF fails from the Sprint Mobile Phone back to my Asterisk box.
> 
> When Vitelity routes that call out a different carrier, DTMF works
fine.
> 
> Can those of you with access to L3 termination and a Sprint Mobile
test
> DTMF back to asterisk?
> 
> Beckman
>
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> Peter Beckman
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> beckman at angryox.com
> http://www.angryox.com/
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