[Asterisk-video] H324M 3G ISDN

Tue Jul 25 04:09:22 MST 2006

If someone is interested, here is some RAW data without byteswap I could get by echoing the data coming from the B channel
So in there we can see the "87B2000000" that repeats non stop and 87 B2 is 10000111 10110010 and Byteswaped -->> 11100001 01001101 which is E1 4D which is the H223 flag as said in annex A.2.1.1 Figure A.1/H223
I guess the 000000 means channel 0 which is H245 ? Could someone give some info about it ???

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

Subject: RE: [Asterisk-video] H324M 3G ISDNDate: Tue, 25 Jul 2006 07:58:50 +0200From: Sergio.Garcia at ydilo.comTo: asterisk-video at lists.digium.com

I modified the q931 transmit_bearer_capability send function to 

        ie->data[0] = 0x88;        ie->data[1] = 0x90;        ie->data[2] = 0xA6;        return 5;

I'm using only outgoing calls due to limitations in our main PBX configuration, so i don't know if there is anything else needed to accept incomming calls.

From: asterisk-video-bounces at lists.digium.com [mailto:asterisk-video-bounces at lists.digium.com] On Behalf Of Ramtin AminSent: lunes, 24 de julio de 2006 18:59To: Development discussion of video media support in AsteriskSubject: RE: [Asterisk-video] H324M 3G ISDN
Would you tell us what you put in the q931.c of the libpri for making asterisk accept the SETUP with the 64kb data option ?Basically what did you modify ?Thx 

Subject: RE: [Asterisk-video] H324M 3G ISDNDate: Mon, 24 Jul 2006 08:34:52 +0200From: Sergio.Garcia at ydilo.comTo: asterisk-video at lists.digium.com

H223 Annex B without double headres (H324M level 2). 
If you are looking at the UCLA/Samsung h223 simulator i understand that you think it's not easy, but i have still not found any device (phone or gateway), that implements annex C.
I use zaptel and a libpri, it would need some modification in order to be configurable, but hardcoding the q931 setup info is quite easy.

From: asterisk-video-bounces at lists.digium.com [mailto:asterisk-video-bounces at lists.digium.com] On Behalf Of Ramtin AminSent: lunes, 24 de julio de 2006 8:26To: Development discussion of video media support in AsteriskSubject: RE: [Asterisk-video] H324M 3G ISDN
Well I'm working on ir currentlySo if we want to do it, since it doesn't look that easy, we better share our knowledge about it.Sergio: In H223, which annexe is used ?I've found some interesting stuff capable of handling the H223+245 but I wanted to understand it more and when you look at the ITU, and it gets into the Golay(24,12) and BCH code, it starts to become more complicated :)Tell us more about your expiriance: you modified the libpri for answering correctly the q.931 ? You use /don't use  zaptel ? How do you capture raw data ? cat /dev/zap/12 ? or with an app_zapgrab ?DO you use BRI or PRI ?  

Subject: RE: [Asterisk-video] H324M 3G ISDNDate: Mon, 24 Jul 2006 08:15:06 +0200From: Sergio.Garcia at ydilo.comTo: asterisk-video at lists.digium.com

Hi everyone, 

    It's good to see that i'm not the only one developping int this subject. 
I have been working on an h234M library, i have finished AL1 and AL2 of h223 (level 2 profile), and almost finished the h245 negotiators. I have been able to establish a videocall between an asterisk box and a motorola phone, but i'm having problems with the negotiations on other phones. 
Are any one of you going to start an open source proyect?

Greetings 
    Sergio

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