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[SOLVED]Zap extension will not ring

ohtrix
Posts: 30
 Member Since:
2009-07-23
Submitted by ohtrix on Tue, 08/04/2009 - 6:00am.

So I setup a zap extension off a Rhino FXS channel bank tied to a Sangoma T1 card. This analog phone can make calls just fine, and it will receive calls just fine. But for some reason the phone will not ring. I can see it dialing the extension, and can pick up the phone to answer the call, but I do not hear any sort of audible ringer coming from it. I checked the Rhino channel bank and the fxs ports are set to loopstart analog lines with power. I even tried jacking the power up on the channels to see if that was the problem.

One other thing, if I reboot my trixbox appliance, during reboot the analog device will ring about 3 rings and then stop. My only guess is that the appliance is checking all trunks/devices etc.

Any help would be greatly appreciated.

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ohtrix
Posts: 30
 Member Since:
2009-07-23
To throw one more thing out
Tue, 08/04/2009 - 7:22am

To throw one more thing out there, going through the call log I see this when dialing my analog device.

dialparties.agi: Methodology of ring is 'none'


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ohtrix
Posts: 30
 Member Since:
2009-07-23
Well I dont think the
Tue, 08/04/2009 - 8:04am

Well I dont think the methodology of ring is 'none' means anything, sip to sip extensions get that same message but ring just fine.

The only thing I can see is that the Rhino channel bank is not transmitting an R or anything when the extension is being rung. But if you pick up the extension while it is being dialed the channel bank will connect you to the dialer.


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SkykingOH
Posts: 9541
 Member Since:
2007-12-17
Something may be wrong with
Tue, 08/04/2009 - 8:23am

Something may be wrong with the ring generator power supply on the rhino bank.

Call Rhino

One other point. channel banks don't use 'R' or any other type of clear text for signaling. Bits are robbed out of the stream named A and B. They are used to indicate ring, hook state and battery reversal.

--

Scott

aka "Skyking"


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jfinstrom
Posts: 2008
 Member Since:
2007-03-07
FYI to anyone who sees this
Tue, 08/04/2009 - 8:49am

FYI to anyone who sees this sort of issue. The channel bank is complicated device that does a simple thing. It takes Analog signals and makes them digital as well as the other way around.

Robbed bit signaling works on a state table composed of 2 bits. All signaling uses the same bits in different ways. If you have your signaing incorrect some of the bits may line up some may not as there is only 4 possible states.

on loop these states are:
FXO
11 = no battery (500ms 11 = farend disconnect
01 = Idle
00 = Ring

FXS
11 = off hook
01 = idle
00 = ring

On the channel bank these are interpreted in to letters more on this can be seen at http://support.rhinoequipment.com/kb/7

You will see 4 bits on the table in that article. In normal use che 2nd two bits simply clone the first two. In some cases like hotels which use Neon Message Waiting the 2nd 2 bits work independently.

All that said the fix is pretty simple. All you need to do is run through the Auto-T1 sequence and the channel bank will re-configure to the T1.

How to on Auto T1: http://support.rhinoequipment.com/kb/5

Hope this helps..

--


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ohtrix
Posts: 30
 Member Since:
2009-07-23
Called Rhino and
Tue, 08/04/2009 - 9:11am

Called Rhino and embarrassingly enough all it took was for me to rerun the "Auto T1" configuration and ringing started working. Now I am onto a new problem with my trixbox server crashing with these analog phones calling outbound.


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SkykingOH
Posts: 9541
 Member Since:
2007-12-17
Good background on how the
Tue, 08/04/2009 - 9:33am

Good background on how the Rhino bank works.

Thanks James.

--

Scott

aka "Skyking"


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