For the Adtran TA900e, but sure you are running AOS A02.03 SC or above if you're going to introduce T.38 into the network. If an Adtran IAD receives a T.38 re-invite and T.38 is disabled on that IAD it will reject the Invite with a 400 Bad Request instead of a 488 Not Acceptable when running the older code revisions. On a separate note, what Cisco and Tekelec issues are you referring too? -- Jason Nesheim ----- Original Message ----- From: "Mark Holloway" <mh at markholloway.com> To: "Kenny Sallee" <kenny.sallee at gmail.com> Cc: voiceops at voiceops.org Sent: Friday, August 28, 2009 7:52:52 PM Subject: Re: [VoiceOps] FAX over VOIP networks Gen1 supports a single T.38 and Gen2 supports 4 T.38. Anything past that falls back to G.711 On Aug 28, 2009, at 1:30 PM, Kenny Sallee wrote: On Fri, Aug 28, 2009 at 12:55 PM, Owen Roth < owen at impulse.net > wrote: We're on a large install of Adtran TA900s here, and we've had good successes with g711u with no T.38 option with low/no jitter, but are moving over to T.38. In the lab, at least, T.38 works great, once we divert our FoIP traffic to an Adtran end-point so that we can avoid our Cisco-Tekelec interoperability issues. -Owen The TA's have a limitation of I think 4 T38 calls at a time tho correct? Depending on 900 vs 900e series... _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops