asterisk users - Mar 2013 - Cisco SPA 5xx/3xx/9xx phones don't respond to SIPAddHeader(Call-Info: answer-after=0)

All other phones we work with will auto-answer when we do this:

[macro-paging1way]
exten => s,1,SIPAddHeader(Call-Info: answer-after=0)
exten => s,n,Page(${PAGINGLIST})
exten => s,n, Hangup

The SPA phones simply ring.  I have verified that Auto Answer Page is set
to yes (the default).  We've tried a variety of firmware versions and phone
ages, going back to an old 942 and new 504s.  Any ideas?

-- 
Carlos Alvarez
TelEvolve
602-889-3003
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.digium.com/pipermail/asterisk-users/attachments/20130321/67d75c30/attachment.htm>

On Thu, Mar 21, 2013 at 2:48 PM, Carlos Alvarez <carlos at
televolve.com>wrote:
> All other phones we work with will auto-answer when we do this:
>
> [macro-paging1way]
> exten => s,1,SIPAddHeader(Call-Info: answer-after=0)
> exten => s,n,Page(${PAGINGLIST})
> exten => s,n, Hangup
>
> The SPA phones simply ring.  I have verified that Auto Answer Page is set
> to yes (the default).  We've tried a variety of firmware versions and
phone
> ages, going back to an old 942 and new 504s.  Any ideas?
>
> --
> Carlos Alvarez
> TelEvolve
> 602-889-3003
>
>
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>                http://www.asterisk.org/hello
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
>

Hi Carlos,
According to this site,
http://community.linksys.com/t5/VoIP-Phones/SPA942-auto-answer-page-intercom-beeping-loudly/td-p/215064the
sip string should be "
Call-Info:\;answer-after=0". I have not tested this yet however.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.digium.com/pipermail/asterisk-users/attachments/20130321/117d9d72/attachment.htm>