[App_rpt] New! app_rpt support for inexpensive hardware
Steve Henke, W9SH, and Jim Dixon have completed the coding of a new channel driver for asterisk named chan_usbradio.c which allows app_rpt to work with modified USB sound fobs based on the CM108 chip. There is an initial write up about this new hardware interface on my site at http://app-rpt.qrvc.com/usbsoundfob.html. The USB channel driver has DSP code in it for CTCSS detection and generation, squelch, pre-emphasis and de-emphasis, audio level setting, and soft limiting. You only need to make 3 connections to a repeater. Discriminator audio, transmit audio. and PTT. A COR input is supported, but not required. The hardware is really inexpensive! USB sound fobs can be bought for $7.95 at places like geeks.com. You will need 3 resistors, a Shottky diode, and an NPN transistor in order to complete the modification. A schematic detailing the modifications and pictures of the USB sound fob before and after modification are posted on at the URL above. I am working on a set of detailed modification instructions with pictures so that those who want to use this interface can modify the USB sound fob themselves. Have Fun! Steve Rodgers, WA6ZFT
Thank you for that excellent job ! 73 from F6HQZ Francois BERGERET France -----Message d'origine----- De : app_rpt-bounces@lists.illiana.net [mailto:app_rpt-bounces@lists.illiana.net]De la part de Stephen Rodgers Envoyé : samedi 15 septembre 2007 07:09 A : Asterisk Repeater Controler Objet : [App_rpt] New! app_rpt support for inexpensive hardware
Wow! Great work guys! So this eliminates the need for an ARIB board and FXO/FXS board? I may finally get the chance to start tinkering with this now!! 73's Stephen K1LNX On 9/15/07, Stephen Rodgers <hwstar@rodgers.sdcoxmail.com> wrote:
Steve Henke, W9SH, and Jim Dixon have completed the coding of a new channel driver for asterisk named chan_usbradio.c which allows app_rpt to work with modified USB sound fobs based on the CM108 chip. There is an initial write up about this new hardware interface on my site at http://app-rpt.qrvc.com/usbsoundfob.html.
The USB channel driver has DSP code in it for CTCSS detection and generation, squelch, pre-emphasis and de-emphasis, audio level setting, and soft limiting. You only need to make 3 connections to a repeater. Discriminator audio, transmit audio. and PTT. A COR input is supported, but not required.
The hardware is really inexpensive! USB sound fobs can be bought for $7.95 at places like geeks.com. You will need 3 resistors, a Shottky diode, and an NPN transistor in order to complete the modification.
A schematic detailing the modifications and pictures of the USB sound fob before and after modification are posted on at the URL above.
I am working on a set of detailed modification instructions with pictures so that those who want to use this interface can modify the USB sound fob themselves.
Have Fun!
Steve Rodgers, WA6ZFT _______________________________________________ App_rpt mailing list App_rpt@lists.illiana.net http://lists.illiana.net/mailman/listinfo/app_rpt
-- Stephen Brown - ARS K1LNX Johnson City, TN EM86uh
participants (3)
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F6HQZ -
Stephen - K1LNX -
Stephen Rodgers