asterisk users - Oct 2014 - SPA504G auto answer

Hello,
I am struggling to have a SPA504G to auto answer (for intercom/paging). I
have tried the following SIP headers (not all together), but without luck:

SIPAddHeader(Call-Info:\;answer-after=0);
SIPAddHeader(Call-Info: answer-after=0);
SIPAddHeader(Alert-Info: info=intercom);
SIPAddHeader(Alert-Info: Ring Answer);
SIPAddHeader(P-Auto-Answer: normal);

Any other ideas?

Leandro

PS
I have set the "Auto Answer Page" to yes
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On 23/10/2014 5:43 AM, Leandro Dardini wrote:
> Hello,
> I am struggling to have a SPA504G to auto answer (for intercom/paging).
> I have tried the following SIP headers (not all together), but without
> luck:
>
> SIPAddHeader(Call-Info:\;answer-after=0);
> SIPAddHeader(Call-Info: answer-after=0);
> SIPAddHeader(Alert-Info: info=intercom);
> SIPAddHeader(Alert-Info: Ring Answer);
> SIPAddHeader(P-Auto-Answer: normal);
>
What does your dialplan look like that makes the paging call?

Listing from my Asterisk:

   '8000' =>         1. Set(SIP_CODEC=alaw)
                     2. 
Dial(MulticastRTP/linksys/224.168.168.168:45678/224.168.168.168:6061)
                     3. Hangup()


Using the Web Interface on you SPA501, log in as admin and select the 
advanced view. Select the SIP tab, down the bottom of the page there is 
a section headed 'Linksys Key System Parameters'.

You will want settings much like

Linksys Key System:  yes
Multicast Address:   224.168.168.168:6061
Key System Auto Discovery:  no
Key System IP Address:   <leave blank>
Force LAN Codec: 711a <may be set to none, G711a or G711u>
Auto Ans GrPage On Active Call:  no

Select the User tab and check

Auto Answer Page:  yes

If you have it all configured much like I have listed hear and it still 
doesn't work then you need to check the firewall configuration on your 
Asterisk  system and ensure it is allowing outbound Multicast traffic.

Larry.