[App_rpt] Radio Interface Question

[Shane Young KØSEY]

It seems when we tried the TDM400, the TDM400 just sorta "stopped working" after a bit.  I don't
think Asterisk itself ever crapped out.

It seems to me that I figured a T1 board was about $500 and a Carrier Access AB1 channel bank was
about $125 on ebay.  This is probably the most stable configuration (other than the PCI Radio
board).  The added bonus is 22 extra FXS stations ;)





Quoting James Harfield <harfija at auburn.edu>:

> Sorry for the delay, my list subscrption settings may be wrong.  I was
> not receiving the digest or any other e-mails to reply to, or know that
> anyone had responded. . .  moving on:
>
> > That assumption isn't correct. It is E&M for zaptel configuration only
> (not in
> > hardware). The card interface 4 wire audio even though only a single
> Zap
> > channel is specified.  In zaptel.conf you should specify:
>
> > e&m = 1
> > ....
>
> > And in zapata.conf you should specify:
>
> > signalling=em_txrx
> > channel = 1
> > ....
>
> > And in rpt.conf you should specify only ONE zap channel:
>
> > [100]                          ; Name of First Repeater
>
> > rxchannel = Zap/1                      ; Rx audio/signalling channel
> > ...
>
> Thank you Steve.  We do have all of that setup or as you suggested.
> Went back and double checked after reading your post just to make sure.
>
> > Please elaborate on how you are trying to connect. When do you get the
> "Unable
> > to create channel Zap" error? Was it when you tried to run Asterisk
> with
> > app_rpt compiled in?
>
> I'll try to ASCII out how we're connecting to our radio:
>
> Radio                  PCI
> Side                    Card
>
> Ext Spkr       =>    1 RXA
> CVC Sense    =>    2 COR
> --not used--  =>    3 UIOA
> --not used--  =>    4 Subtone
> PTT             =>    5 PTT
> --not used--  =>    6 UIOB
> Ext Mic        =>     7 TXA
> RF Ground    =>     8 GND
>
> With that attached, just through an RJ-45 cable, we load up Asterisk.
> Then after connecting to Asterisk via a Softphone we try to dial the
> radio.  Our extensions.conf file looks like this for dialing the Zap
> channel:
>
> exten => 205,1,Dial(Zap/1/1999)
>
> 1999 was the channel name we gave it.  It is at this point, when we dial
> it, that the "Unable to create channel type Zap" error.
>
> > Your concern is true. It isn't true E&M at the hardware level. COR is
> a input
> > which accepts voltages from 0 to 13.8V and PTT is an open drain output
> from a
> > power MOSFET. See the quadradio_pci_installation.pdf file on
> app-rpt.qrvc.com
> > for more information on how to interface to the board.
>
> > As stated above, It is E&M only at the software configuration level.
>
> > Hooking the signals of the Quad Radio Card to a real E&M interface
> could
> > damage the board as -48V exceeds the component ratings of the parts in
> the
> > input and output circuits. Hopefully you didn't do this?!
>
> That makes a lot of sense.  I knew something was up and the -48V thing
> wouldn't pan out.  That's why I wanted to make 100% sure before actually
> hooking up the base station we had laying around.
>
> Thanks again Steve.
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