[VoiceOps] The peer of my peer is my peer?

[Hiers, David]

I've got a level3 phone set up for g729 only, it won't run g711.  I'll provide the number off-list.

If you want to see how things work, fire up a 711-only phone and call this 729-only phone.



David Hiers

CCIE (R/S, V), CISSP
ADP Dealer Services
2525 SW 1st Ave.
Suite 300W
Portland, OR 97201
o: 503-205-4467
f: 503-402-3277


-----Original Message-----
From: Hiers, David 
Sent: Wednesday, July 14, 2010 12:04 PM
To: Hiers, David; voiceops at voiceops.org
Subject: RE: The peer of my peer is my peer?

If you want to run a test to see what's really happening, reply off-list for details.



David Hiers

CCIE (R/S, V), CISSP
ADP Dealer Services
2525 SW 1st Ave.
Suite 300W
Portland, OR 97201
o: 503-205-4467
f: 503-402-3277


-----Original Message-----
From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of Hiers, David
Sent: Tuesday, July 13, 2010 1:39 PM
To: voiceops at voiceops.org
Subject: [VoiceOps] The peer of my peer is my peer?

Every so often this issue comes up, and I want to get a read on it from other VOIP resellers...

 

Consider a couple of unrelated VOIP resellers that peer with a carrier like L3.  Both can interop with L3 using strict SIP and RTP settings (max forwards, g729 only, 10ms ptime, whatever).  Both are free to select mutually incompatible settings.  For instance, reseller A can chose 729 only, and reseller B can choose 711 only.  L3 will connect both to the PSTN without any trouble.

 

Everything is good until they try to call each other.  Then the mutually incompatible settings will break calls or render predicted usage patterns invalid.  Sure, you're still signaling to a L3 SIP server, but some the information in the SIP/SDP packets that you receive is controlled by the other reseller.

 

How often do you see problems related to the peer of your peer?

 

 

 

 

David Hiers

CCIE (R/S, V), CISSP
ADP Dealer Services
2525 SW 1st Ave.
Suite 300W
Portland, OR 97201
o: 503-205-4467
f: 503-402-3277

 

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