I have a couple of devices that need an analog modem to communicate outside of our Asterisk system. Most FXS gateways don't seem to support this... I have a stack of Sipura 2002's that are, AFAIK, worthless for this purpose. I've heard that Digium's IAXy FXS will work with modems, but I can't find any reference to that in their documentation. There is also the VegaStream Vega 50 that claims to support v.90 on 8 FXS ports per unit. Does anyone have experience with these devices, or can recommend anything else? - .Dustin Wenz
Little expensive, but Adtran Atlas 550 + Octal analog card works fine. $5k. -----Original Message----- From: Dustin Wenz [mailto:dwenz@iscompanies.com] Sent: Monday, February 06, 2006 4:21 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] FXS with v.90 modem support? I have a couple of devices that need an analog modem to communicate outside of our Asterisk system. Most FXS gateways don't seem to support this... I have a stack of Sipura 2002's that are, AFAIK, worthless for this purpose. I've heard that Digium's IAXy FXS will work with modems, but I can't find any reference to that in their documentation. There is also the VegaStream Vega 50 that claims to support v.90 on 8 FXS ports per unit. Does anyone have experience with these devices, or can recommend anything else? - .Dustin Wenz _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
On Mon, 6 Feb 2006, Dustin Wenz wrote:> I have a couple of devices that need an analog modem to communicate outside of > our Asterisk system. Most FXS gateways don't seem to support this... I have a > stack of Sipura 2002's that are, AFAIK, worthless for this purpose. > > I've heard that Digium's IAXy FXS will work with modems, but I can't find any > reference to that in their documentation. There is also the VegaStream Vega 50 > that claims to support v.90 on 8 FXS ports per unit. Does anyone have > experience with these devices, or can recommend anything else?Have you had a look at Eicon's analog cards? They have 4 and 8 port cards with DSPs on board which should support V.90 as well. (I never used them, but they are supported by chan_capi as well as the ISDN cards. Armin
Dustin Wenz wrote:> I have a couple of devices that need an analog modem to communicate > outside of our Asterisk system. Most FXS gateways don't seem to > support this... I have a stack of Sipura 2002's that are, AFAIK, > worthless for this purpose. > > I've heard that Digium's IAXy FXS will work with modems, but I can't > find any reference to that in their documentation. There is also the > VegaStream Vega 50 that claims to support v.90 on 8 FXS ports per > unit. Does anyone have experience with these devices, or can > recommend anything else?Then important things here are that you must only digitise once, and that the path must be clean and free of timing slips. Things like modem <-> FXS <-> asterisk <-> FXO <-> PSTN will not work. The signal is digitised, returned to analogue, then the PSTN will digitise it again. In general VoIP boxes of any kind will not work, as they do not guarantee a clean path. What should work is modem <-> FXS <-> asterisk <-> E1 or t1 <-> PSTN However, a lot of people have problems getting even this configuration to give clean enough results for V.90 to work. Steve