[App_rpt] New! app_rpt support for inexpensive hardware

[Stephen - K1LNX]

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 at 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
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>



-- 
Stephen Brown - ARS K1LNX
Johnson City, TN EM86uh
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