[Asterisk-Users] Asterisk and RTP streams (just bumping)

[Sherwood McGowan]

Thanks for the heads up. I guess BOTH devices then have to be configured to
use the same port for outgoing as the incoming came in on. I know some UA's
have this option, I'll just have to figure it out.

Cheers,
Sherwood 

->-----Original Message-----
->From: asterisk-users-bounces at lists.digium.com 
->[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
->Rich Adamson
->Sent: Saturday, October 01, 2005 9:21 AM
->To: Asterisk Users Mailing List - Non-Commercial Discussion
->Subject: RE: [Asterisk-Users] Asterisk and RTP streams (just bumping)
->
->Just as a FYI, the rtp port that is used for any device 
->(asterisk or a sip adapter) is choosen "by the device". If a 
->sip adapter as an example attempts to initiate an rtp 
->session, changing asterisk won't have any impact.
->
->Or, saying this a little different, asterisk can initiate an 
->rtp session using an rtp/udp port from within the range 
->specified in rtp.conf, but the other end of that rtp session 
->(sip adapter) gets to pick its own udp port for the return 
->data. The udp port selected is often times picked from a 
->range that you have control over, but in all cases that I can 
->think of, you can't tell the device to always pick a single 
->predetermined udp port.
->
->So, unless I've really missed the point in the discussion 
->below, I don't believe the proposed port selection changes 
->can be accomplished.
->
->------------------------
->
->> Bumping, just in case it got lost in the shuffle today... I 
->think this 
->> is an important thing to be able to do.
->> 
->> Subject: [Asterisk-Users] Asterisk and RTP streams
->> 	
->> Guys, I've been poking around trying to find a good answer for this 
->> via voip-info, google, etc... Haven't found anything that helps, so 
->> maybe you mates could.
->> 	 
->> A lot of my customers are using Linksys UAs (router/ATA 
->PAP2) and some 
->> using Sipura SPA-2002s. Every once in a while, the customer 
->will get 
->> one-way audio. I've read that this is commonly caused by 
->the outgoing 
->> RTP port not being the same as the incoming RTP port. A lot 
->of other 
->> devices (I found info on forcing Xten to do it) can be 
->forced to use 
->> the same port for both, but these devices don't have an 
->option (that 
->> I've been able to find, even in the provisioning configs) 
->to do this. So, my question is two-fold:
->> 	 
->> 1. Can Asterisk be told to send the RTP stream for incoming and 
->> outgoing always on the same set of ports?
->> 2. Does anyone know something that I'm missing for the 
->above mentioned 
->> devices? They're all the 2 line version of the ATA and/or router 
->> configs (wireless and wired)
->> 	 
->> Thank you all in advance for your thoughts and comments. I 
->apologize 
->> in advance if I missed something that was publicly available.
->> 	 
->> Sherwood McGowan
->> 
->> 
->> 
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