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Considering that, based on past conversations with my L3 SE, I believe depending on the network you are on L3 doesn't necessarily have the ability to trap "on network" calls as such and lets them go to PSTN and hairpin back, I wouldn't consider this to be a big issue but it means you will find common ground there. I think their Vector network is a bit more intelligent, however since you never converse directly with another customer (look at the traffic you send L3, they hold all media), I cant imagine them not just routing this through a media server and trans-coding between the disparate parties.<BR>
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On Tue, 2010-07-13 at 15:38 -0500, Hiers, David wrote:
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Every so often this issue comes up, and I want to get a read on it from other VOIP resellers...<BR>
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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.<BR>
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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.<BR>
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How often do you see problems related to the peer of your peer?<BR>
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David Hiers<BR>
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CCIE (R/S, V), CISSP<BR>
ADP Dealer Services<BR>
2525 SW 1st Ave.<BR>
Suite 300W<BR>
Portland, OR 97201<BR>
o: 503-205-4467<BR>
f: 503-402-3277<BR>
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