Re: [Asterisk-Users] Modem and Fax over VoIP
On Mon, 2003-10-06 at 10:12, Eduardo Goncalves wrote: Hello, I have the fowling scenario: fxs[asterisk1]-iax-[asterisk2]e1em---PSTN I want to know the steps to transmit fax from a machine connected to the fxs to a fax machine on the PSTN. The same for dial-up's. Is it possible only with a/ulaw ? What configs I need in asterisk1? If asterisk2 is your only access to the PSTN, then it doesn't make a lot of sense to do fax over VoIP. Put a couple of modems on asterisk2 with matching FXS ports and learn to use Hylafax. You will get better performance out of the faxing and potentially lower bills. Also it is more flexible. Not to mention that the bandwidth over VoIP to make data quality calls is around 80k of VoIP to get flakey 9.6k. Do you need to waste 10x bandwidth for sub par functionality? -- Steven Critchfield [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Modem and Fax over VoIP
On Mon, 06 Oct 2003 13:43:21 -0500 Steven Critchfield [EMAIL PROTECTED] wrote: On Mon, 2003-10-06 at 10:12, Eduardo Goncalves wrote: Hello, I have the fowling scenario: fxs[asterisk1]-iax-[asterisk2]e1em---PSTN If asterisk2 is your only access to the PSTN, then it doesn't make a lot of sense to do fax over VoIP. Put a couple of modems on asterisk2 with matching FXS ports and learn to use Hylafax. I can't. Because asterisk1 is at a remote site. And the only access to PSTN at this remote site is trough asterisk2. performance out of the faxing and potentially lower bills. Also it is more flexible. Not to mention that the bandwidth over VoIP to make data quality calls is around 80k of VoIP to get flakey 9.6k. Do you need to waste 10x bandwidth for sub par functionality? Is it possible to config asterisk1 to change to g.711 only when a fax transmission is detected? Thanks Eduardo ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Modem and Fax over VoIP
On Mon, 2003-10-06 at 13:55, Eduardo Goncalves wrote: On Mon, 06 Oct 2003 13:43:21 -0500 Steven Critchfield [EMAIL PROTECTED] wrote: On Mon, 2003-10-06 at 10:12, Eduardo Goncalves wrote: Hello, I have the fowling scenario: fxs[asterisk1]-iax-[asterisk2]e1em---PSTN If asterisk2 is your only access to the PSTN, then it doesn't make a lot of sense to do fax over VoIP. Put a couple of modems on asterisk2 with matching FXS ports and learn to use Hylafax. I can't. Because asterisk1 is at a remote site. And the only access to PSTN at this remote site is trough asterisk2. unless you are using standalone fax units for the scanning, then you should be able to. The scenario I laid out above was for specifically this case. Drop a cheap flatbed scanner in to capture the image, then send it to hylafax at asterisk2 location to hop a local modem to a FXS port and off to the net. You can then receive incoming faxes via email or similar and then choose what to print. performance out of the faxing and potentially lower bills. Also it is more flexible. Not to mention that the bandwidth over VoIP to make data quality calls is around 80k of VoIP to get flakey 9.6k. Do you need to waste 10x bandwidth for sub par functionality? Is it possible to config asterisk1 to change to g.711 only when a fax transmission is detected? If it is on a specific non shared port, then you can set it up in a context that uses a different username and password to connect, and in that definition disallow all and allow ulaw. Just know that this method is spotty, and may not work because of problems in the fax protocol and timing needs. search archive for very good explanations of this problem. -- Steven Critchfield [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Modem and Fax over VoIP
Fax with G711 works fine. Modem will be slow, but if you really need to use it slown them down to 28.8 or 33.6 -Original Message- From: [EMAIL PROTECTED] [mailto:asterisk-users- [EMAIL PROTECTED] On Behalf Of Eduardo Goncalves Sent: Monday, October 06, 2003 2:56 PM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] Modem and Fax over VoIP On Mon, 06 Oct 2003 13:43:21 -0500 Steven Critchfield [EMAIL PROTECTED] wrote: On Mon, 2003-10-06 at 10:12, Eduardo Goncalves wrote: Hello, I have the fowling scenario: fxs[asterisk1]-iax-[asterisk2]e1em---PSTN If asterisk2 is your only access to the PSTN, then it doesn't make a lot of sense to do fax over VoIP. Put a couple of modems on asterisk2 with matching FXS ports and learn to use Hylafax. I can't. Because asterisk1 is at a remote site. And the only access to PSTN at this remote site is trough asterisk2. performance out of the faxing and potentially lower bills. Also it is more flexible. Not to mention that the bandwidth over VoIP to make data quality calls is around 80k of VoIP to get flakey 9.6k. Do you need to waste 10x bandwidth for sub par functionality? Is it possible to config asterisk1 to change to g.711 only when a fax transmission is detected? Thanks Eduardo ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Modem and Fax over VoIP
On Mon, 2003-10-06 at 15:12, Andrew Joakimsen wrote: Fax with G711 works fine. Modem will be slow, but if you really need to use it slown them down to 28.8 or 33.6 This depends on if you have consistent latency and otherwise no jitter. On my 12 hop link with the office over a cable modem, it is iffy to get a modem connection up. The connection occasionally claimed 14400, but never was over 1200 in actual output. So again, this is chancy at best and in the end will result in longer calls between fax machines. A cheap modem, and a $10 scanner will solve the problem and keep you faxes going out fast. Steven Critchfield [EMAIL PROTECTED] wrote: On Mon, 2003-10-06 at 10:12, Eduardo Goncalves wrote: Hello, I have the fowling scenario: fxs[asterisk1]-iax-[asterisk2]e1em---PSTN If asterisk2 is your only access to the PSTN, then it doesn't make a lot of sense to do fax over VoIP. Put a couple of modems on asterisk2 with matching FXS ports and learn to use Hylafax. I can't. Because asterisk1 is at a remote site. And the only access to PSTN at this remote site is trough asterisk2. performance out of the faxing and potentially lower bills. Also it is more flexible. Not to mention that the bandwidth over VoIP to make data quality calls is around 80k of VoIP to get flakey 9.6k. Do you need to waste 10x bandwidth for sub par functionality? Is it possible to config asterisk1 to change to g.711 only when a fax transmission is detected? Thanks Eduardo ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users -- Steven Critchfield [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
