Hello, I was wondering if anyone had any ideas to a problem I am having. I have asterisk installed, and running. All extension phones are analog on FXS ports. The phones call each other and even transmit caller ID information but they DO NOT RING. Here is my setup: T400P Quad span T1 card currently connected to a CAC I w/ 12 channels of FXO for incoming lines and 12 channels of FXS for internal lines. All the lights on the CAC indicate normal operation. I have an inductive amplifier and put it near the cables to try to hear a ring and I get nothing while I am able to hear the pulses from dialing. Is it possible that the CAC I is defective? I bought it on ebay and it seems to only support span=1,0,0,d4,ami and not span=1,0,0,esf,b8zs. It passes self test and lights are normal. Is it possible the emp connector and cable is causing the problem? It is an old HP scanner cable with a choke near the connector. Where is ring generated anyway? Is it in the channel bank or is it exclusively in the software? Is there any possible setting that I have screwed up? Thanks so much for any help, Jason I am really excited about setting this system up. I started it for work but now I want one at home to block unsolicited calls among other things.
> Is it possible that the CAC I is defective? I bought it on ebay and it > seems to only support span=1,0,0,d4,ami and not span=1,0,0,esf,b8zs. > It passes self test and lights are normal. > > Is it possible the emp connector and cable is causing the problem? It > is an old HP scanner cable with a choke near the connector. > > Where is ring generated anyway? Is it in the channel bank or is it > exclusively in the software? Is there any possible setting that I have > screwed up?Judging from my experience with Critch, there is a good chance your channel bank doesn't really have FXS ports, but instead has DPT ports which are like FXO ports which supply battery. You *may* be able to contact CAC and find out, but when we tried calling, they literally denied that the product we had existed :) Mark
On Sun, 2003-04-27 at 22:44, Surfer Dude wrote:> Is it possible that the CAC I is defective? I bought it on ebay and it > seems to only support span=1,0,0,d4,ami and not span=1,0,0,esf,b8zs. > It passes self test and lights are normal. >It's entirely possible... when you say your CAC doesn't support esf/b8sz, did you try changing the dip switches to set your CAC to use esf/b8sz?> Is it possible the emp connector and cable is causing the problem? It > is an old HP scanner cable with a choke near the connector. >This is most likely the problem... I wouldn't trust a scanner cable to be wired correctly...
At 08:26 AM 4/28/2003 -0600, you wrote:>On Sun, 2003-04-27 at 22:44, Surfer Dude wrote: > > Is it possible that the CAC I is defective? I bought it on ebay and it > > seems to only support span=1,0,0,d4,ami and not span=1,0,0,esf,b8zs. > > It passes self test and lights are normal. > > >It's entirely possible... when you say your CAC doesn't support >esf/b8sz, did you try changing the dip switches to set your CAC to use >esf/b8sz?Yes, I tried the dip switches. I have T1 Framing, Line Code, and CSU on/off switched to the up position. Framing only happens in the up position and it only happens when I select d4 in digium.> > Is it possible the emp connector and cable is causing the problem? It > > is an old HP scanner cable with a choke near the connector. > > >This is most likely the problem... I wouldn't trust a scanner cable to >be wired correctly...That was all I had at home. The production system will use regular telco equipment. If the problem is the CAC I bank then that will be ok because the production system, at work, will use 3 x CAC II banks that I also baught on ebay ($1000). Before I brought the T1 card home to setup and test the system I had the CAC II banks speaking esf/b8sz. I didn't have the extensions file set up however to see if I could ring phones. All this verbage is new to me. I do not have a telco background... Can someone tell me where ring is generated? Is it the electronics in the channel bank or is it a signal sent from the software? Thanks, Jason
On Monday, April 28, 2003 12:12 PM, Surfer Dude [SMTP:swell@labranch.com] wrote:>...> Can someone tell me where ring is generated? Is it the electronicsin> the channel bank or is it a signal sent from the software? >The software (asterisk) will determine the state (in this case ringing) and send that information to the channel bank over the T1 line via the signaling bits of the appropriate channel. The Channel bank will recognize the 'ring the phone' signal and which channel of the 24 it applies to and then provide the ringing voltage to the appropriate phone line. Don Pobanz> > Thanks, > Jason >
On Monday, April 28, 2003 11:58 PM, Surfer Dude [SMTP:swell@labranch.com] wrote:> > So, is the 90v constant during ring? Or is it intermittent? Doesthe phone> "see" the 90v then make a periodic sound? In other words does the90v> occilate? Is it possible to change the sound of the ring through * > (I figured out what people ment by * (smile)) or is the ring sound afuntion> of the phone? > > Thanks, > Jason >Back at the local phone company the normal pots line had 48 volts dc for an on-hook phone. On top of that was a 50 volt 20 Hz AC signal which was present only when the phone was to ring. The most common cadence for that is 2 seconds on (ringing) followed by 4 seconds off. This use to be what would ring the phone when there were only mechanical ringers. To vary the cadence (or distinctive ring) requires that the 50 volt ac be turned off and on in the desired cadence. The electronic ringers are 'told' the same way when to ring. The only difference is that they generate their own sound. Yes it is possible to change the ring through *. I don't recall the exact syntax but it is something like exten => _2xx,1,dial(Zap/16,r1) where r1 = distinctive ring number 1 r2 = distinctive ring number 2 r3 = distinctive ring number 3 Don Pobanz