So "analog" options doesn't sound right for a T1 on Freeswitch, but choosing "loop start" sounds perfectly normal for Asterisk? Hint - they aren't digital loops you are starting. Regards, Steve On 06/11/2014 11:37 PM, Bob Hartwig wrote:
Hello all,
I have a project coming up that will require me to interface Freeswitch to some rather arcane legacy T1 protocols. Specifically digital loop start, and station-side digital loop start. I'm concerned that the userland support for these may be incomplete or even non-existent in FreeTDM.
I've successfully used FreeTDM to connect to PRI, but when I look for span configuration options for CAS T1, the only things that I see that may be applicable are described as "analog" options, and that doesn't sound quite right for loop start on T1 channels (but I could be wrong about that). If I were to use Asterisk for this, I would configure chan_dahdi.conf for "signalling=fxs_ls" and/or "signalling=fxo_ls".
Should I pursue using FreeTDM for this, or would I be smarter to incorporate a simple Asterisk gateway to handle this legacy CAS T1 signaling?
Thanks, Bob