[SIPForum-discussion] issue of the VoIP for the point-of-sale terminals

[murat buker]

Thanks. Still I don't get it. If offerer offers 3 different codecs ( 
example g729,g711,g722), how can it allocate its dsp resource... As if 
it is g729 or as if it is g711 or as if it is g722 or for all of them 
separately ? It is not a resource wise behavior and not logical in my 
opinion.

But again thanks, I will research little bit more.

Murat Buker




________________________________
 From: Stephen James <sjames_1958 at yahoo.com>
To: murat buker <murat_buker at yahoo.com>; Joey ZHENG <joey.zheng at sagemcom.com> 
Cc: "discussion at sipforum.org" <discussion at sipforum.org> 
Sent: Wednesday, January 23, 2013 2:01 AM
Subject: Re: [SIPForum-discussion] issue of the VoIP for the point-of-sale terminals
 

My mistake it is RFC 3264 - 

Once the offerer has sent the offer, it MUST be prepared to receive media for any recvonly streams described by that offer.  It MUST be prepared to send and receive media for any sendrecv streams in the offer, and send media for any sendonly streams in the offer 
Stephen James 
sjames_1958 at yahoo.com
 
We are not princes of the earth, we are the descendants of worms, and any nobility must be earned.





________________________________
From: murat buker <murat_buker at yahoo.com>
To: Stephen James <sjames_1958 at yahoo.com>; Joey ZHENG <joey.zheng at sagemcom.com>
Cc: "discussion at sipforum.org" <discussion at sipforum.org>
Sent: Tue, January 22, 2013 5:47:06 PM
Subject: Re: [SIPForum-discussion] issue of the VoIP for the point-of-sale terminals


Hi James,

Early media means early SDP handsakes. In Joey's case, there is no SDP handshake, so gateway can't prepare itself ( because gateway does'nt know codec etc.., it can't allocate it's dsp resource). Please highlight RFC statements that cover your opinion, and let me correct myself.

Murat Buker




________________________________
 From: Stephen James <sjames_1958 at yahoo.com>
To: Joey ZHENG <joey.zheng at sagemcom.com> 
Cc: "discussion at sipforum.org" <discussion at sipforum.org> 
Sent: Tuesday, January 22, 2013 10:20 PM
Subject: Re: [SIPForum-discussion] issue of the VoIP for the point-of-sale terminals
 

Once the gateway has sent it should be prepared to receive RTP per RFC 3261 or 3262. There may be a gateway setting to enable early media. 

Sent from my iPhone

On Jan 21, 2013, at 21:48, Joey ZHENG <joey.zheng at sagemcom.com> wrote:



>Hi All, 
>
>Now we got a problem: 
>The test setup: 
>POS payment terminal----->Gateway<---------->Internet<---->party
B 
>Once B received the invite, it will
send the RTP packets immediately to Gateway. 
>And it cause the problem that:  
>Gateway didn't receive the SDP in 200
or 180 to know the RTP information, then early RTP packets to the gateway
are dropped, not transferred to the POS terminal. 
>But there are some handshake signal
in these early RTP packets, like 2100Hz CED. And since POS didn't receive
the CED signal, the handshake between POS terminal and the party B always
failed.  
>
>Is there anyone who got the same problem,
and what's the best solution for this? Is there any way to notify the party
B to delay the RTP stream by the SIP message? 
>
>BRS, 
>
>Joey 
> 
>#
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