[VoiceOps] ATT Wireless Dropped Calls

[Eric Hiller]

By the time I had our switch vendor on the phone Friday everything was
working fine and I couldn't make it error.

May never know but at least now I know how to get the ss7 captures.

On Sun, July 11, 2010 8:12 am, Yeager, Charles wrote:
> Timing between IAM and ACM? 180 vs. 183?
>
>
> ________________________________________
> From: voiceops-bounces at voiceops.org [voiceops-bounces at voiceops.org] On
> Behalf Of Frank Bulk [frnkblk at iname.com]
> Sent: Wednesday, July 07, 2010 9:24 PM
> To: 'Eric Hiller'; voiceops at voiceops.org
> Subject: Re: [VoiceOps] ATT Wireless Dropped Calls
>
> What does the SS7 signaling look like for that call?
>
> Frank
>
> -----Original Message-----
> From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org]
> On Behalf Of Eric Hiller
> Sent: Wednesday, July 07, 2010 8:20 PM
> To: voiceops at voiceops.org
> Subject: [VoiceOps] ATT Wireless Dropped Calls
>
> This is a strange issue I just found out about, not sure how long it has
> been happening. Apparently any ATT Wireless calls that come into our
> system (an possibly just those that terminate into asterisk via sip(only
> complaints so far)) are dropped. Our switch is connected to ATT Wireless
> over ISUP/SS7 trunks and the calls are coming out as SIP. Asterisk gets a
> SIP INVITE from the switch, then responds with a 100 Trying and a 200 OK,
> The switch then sends an ACK and then a BYE. The ATT Wireless customer
> just hears beep beep beep call lost.
>
> Any ideas? It doesn't happen 100% of the time, but the vast majority. Also
> a Wait(1) in asterisk before answering doesn't seem to make any
> difference?
>
> Thanks for any ideas!
> -Eric
>
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