asterisk users - Jan 2005 - E&M trunk card?

Has anyone found an inexpensive E&M trunk card that will play with *? 
Looking for an interface to a legacy electromechanical PBX that's able 
to pass answer supervision. Docs on the X100P card would be helpful, we 
could probably pull E&M out of that. Any ideas?

> Has anyone found an inexpensive E&M trunk card that will play with *? 
> Looking for an interface to a legacy electromechanical PBX that's able 
> to pass answer supervision. Docs on the X100P card would be helpful, we 
> could probably pull E&M out of that. Any ideas?
I don't believe there are any cards available that support e&m leads
other then using a T1 card and a channel bank. You would probably
need to find an older channel bank since the newer less-expensive
ones don't have e&m cards either.

The x100p card will not support e&m leads. The specs that would be of
interest for the x100p are the Silicon Labs 3012 and 3021 chips. You
can find them at the www.silabs.com site.

Even if you heavily modified the x100p card to somehow create the
e&m leads, you'd still spend a significant amount of time modifying
asterisk code to use the modifications.

You might check the legacy pbx to see if a loop trunk with mf tones
might be available from somewhere.

You might be able to get 4-wire E&M working with a normal sound card and
a couple of pins off the printer port though for the E&M lines...  Not
scalable and not elegent, but it might just work...

Rgds
Tim Robinson

-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Kevin P.
Fleming
Sent: 10 January 2005 17:02
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] E&M trunk card?


Rich Adamson wrote:
> Even if you heavily modified the x100p card to somehow create the e&m 
> leads, you'd still spend a significant amount of time modifying 
> asterisk code to use the modifications.
And you also need to know whether that legacy box is doing 4-wire E&M or

6-wire... if it's 6-wire, then the X100P can't do it anyway, because it 
runs everything through a hybrid (I've been in that boat before, ordered

the wrong cards for a channel bank to connect to a NEC PBX back in the 
dark ages <G>).
_______________________________________________
Asterisk-Users mailing list
Asterisk-Users@lists.digium.com
http://lists.digium.com/mailman/listinfo/asterisk-users
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users