Hi!
I want to send fax to PSTN with Asterisk, but by now I
can't.
I am using the following boxs:
Internet Zap E1
Phone/Fax<----> Gateway(H323)<---> Asterisk<---> PSTN
The gateway H323 has T38 and T30. Before I began with
Asterisk, I used Cisco to connect with PSTN, and the
Fax worked very well in T38 (T30 didn't work, I think
the reason is the jitter).
I have read that Asterisk doesn't support T.38, is
this correct?, is there any comercial implementation
in Asterisk?.
If Asterisk doesn't support T.38, how can I use it to
send fax to PSTN?
Thanks in advance.
______________________________________________
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Hi Jairo, Try with other values for the jitter in your Gateway (H323). One customer have a scenario like this: Phone/Fax <----> Gateways H323 -with 16/8/2/1 Port FXS- <---> GNUGK <---> Asterisk <---> Zap (E1) .. and only we need modified the jitter settings in two Gateways. Rafael Gonzalez Lome?a El mar, 19-04-2005 a las 12:09 +0200, Jairo Buendia escribi?:> Hi! > I want to send fax to PSTN with Asterisk, but by now I > can't. > I am using the following boxs: > > Internet Zap E1 > Phone/Fax<----> Gateway(H323)<---> Asterisk<---> PSTN > > The gateway H323 has T38 and T30. Before I began with > Asterisk, I used Cisco to connect with PSTN, and the > Fax worked very well in T38 (T30 didn't work, I think > the reason is the jitter). > > I have read that Asterisk doesn't support T.38, is > this correct?, is there any comercial implementation > in Asterisk?. > > If Asterisk doesn't support T.38, how can I use it to > send fax to PSTN? > > Thanks in advance. > > > > ______________________________________________ > Renovamos el Correo Yahoo!: ?250 MB GRATIS! > Nuevos servicios, m?s seguridad > http://correo.yahoo.es > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users-- Rafael Angel Gonzalez Lome?a Ingeniero I+D / R&D Ingenieer rafael.gonzalez@avanzada7.com Avanzada7, S.L. Parque Tecnologico de Andaluc?a Edf. Centro de Empresas Avd. Juan Lopez Pe??lver,17 3? 29590 Campanillas M?laga (Espa?a/Spain) Telf. 911830149 Ext. 703 951014943 Ext. 703 951014947 Fax. 951010922
Hi Rafa!>Hi Jairo, > >Try with other values for the jitter in your Gateway(H323).> >One customer have a scenario like this:>Phone/Fax <----> Gateways H323 -with 16/8/2/1 PortFXS- <---> GNUGK <---> Asterisk <---> Zap (E1) We have the same configuration, and I think that our problem is the jitter in Asterisk, since we have jitterMin=0ms and jitterMax=0ms. We changed chan_oh323.c because it didn't accept jitter less than 20ms (We used Asterisk to translate SIP --> H323-->Cisco, and the Cisco have jitter buffer, so we didn't need jitter buffer in Asterisk). Now, we have put: oh323.conf ---> jitterMin=20ms jitterMax=20ms codec=G711A frames=20 zapata.conf ---> jitterbuffers=20ms but fax still doesn't work. Anyideas? Other question. If Asterisk hasn't T.38 then Fax will need 64Kbps (G711)+ 16Kbps (IP+UDP+RTP) bandwidth, and that is much bandwidth. Is this correct?, Do you know any comercial implementation of T.38 to Asterisk? Thanks. ______________________________________________ Renovamos el Correo Yahoo!: ?250 MB GRATIS! Nuevos servicios, m?s seguridad http://correo.yahoo.es