[asterisk-users] Help with Codes and Polycom Phones

[Eric Wieling]

Only the higher end Polycoms support Siren7 and Siren14.   I believe only the VVX and SoundStation IP phone support those codes.  

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of David Klaverstyn
Sent: Thursday, February 09, 2012 5:08 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion (asterisk-users at lists.digium.com)
Subject: [asterisk-users] Help with Codes and Polycom Phones

Hi All,

 

This may be an off topic but I'm not sure who else would know the answer. I'm playing around with Asterisk and Polycom phones.  I see Polycom supports quite a few codec.  The usual ones and these:

 

G722 

 

Siren14.24kbps                 Siren22.32kbps

Siren14.32kbps                 Siren22.48kbps

Siren14.48kbps                 Siren22.64kbps

 

G7221.16kbps                    G7221_C.24kbps

G7221.24kbps                    G7221_C.32kbps

G7221.32kbps                    G7221_C.48kbps

 

 

I can get Asterisk to work with G722 and the sound is superior compared to uLAW. I tried to get it working with Siren7 and Siren14 but I cannot.  It always says incompatible codec and what is this Siren14 and Siren22 with Polycom.  Is this different to Asterisk's Siren7 and Siren14?  Is this why I cannot get Siren to function?

 

siren7 show version        : Digium Siren7 Module Version 1.8.0_1.0.5 (optimized for barcelona_64)

siren14 show version     : Digium Siren14 Module Version 1.8.0_1.0.5 (optimized for barcelona_64)

 

I found this document : http://www.polycom.com/global/documents/whitepapers/codecs_white_paper.pdf which is quite good.

It sais:

G.722.1. Also known as "Siren 7"

G.722.1 Annex C. Also known as "Siren14"

 

This doesn't explain why the Polycom    G7221_C doesn't work with Asterisk's Siren14

G.722.1 doesn't work with Asterisk's Siren7

 

Am I just doing something wrong?  Is my understand correct?

 

So what is Siren14 and Siren22 on the Polycom handsets?  What does that match to in Asterisk?

 

 

Regards
David Klaverstyn