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CallerID, Ring No Answer, DTMF and Crosstalk


Jeff Lee
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We've just installed a CS410 - 3.0.1.3023 (Linux) and we are having several issues:

 

1. External caller ID will not come through to any phones but does eventually show up in the logs as below:

 

2007/12/31 19:40:59 Anonymous (anonymous@localhost) Jeff *** (227@localhost) 00:05

2007/12/31 19:41:32 JEFF *** (613*******@localhost) CO4 00:19

 

2. If someone is on a call then the system simply won't pick up consistently, we have 3 PSTN lines connected. (in fxo1 - 3 so the CO4 thing above is confusing)

 

3. Certain companies that use menus (like press 1 for english) are not picking up the user input (I think I may have fixed that with the gain control)

 

4. If someone's on a call, they hear EVERYTHING from any other line, the ring, the auto attendant pick up and the voices, both ends of the call hear it as clear as day. These same lines were hooked into a Nortel switch for years with no issues.

 

Phones are eyeBeam 1.5.19.2 and Pollycom Soundpoint 330.

 

Any help would be appreciated as we're on the verge of tearing it out.

 

/Jeff

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We've just installed a CS410 - 3.0.1.3023 (Linux) and we are having several issues:

 

1. External caller ID will not come through to any phones but does eventually show up in the logs as below:

 

2007/12/31 19:40:59 Anonymous (anonymous@localhost) Jeff *** (227@localhost) 00:05

2007/12/31 19:41:32 JEFF *** (613*******@localhost) CO4 00:19

 

2. If someone is on a call then the system simply won't pick up consistently, we have 3 PSTN lines connected. (in fxo1 - 3 so the CO4 thing above is confusing)

 

3. Certain companies that use menus (like press 1 for english) are not picking up the user input (I think I may have fixed that with the gain control)

 

4. If someone's on a call, they hear EVERYTHING from any other line, the ring, the auto attendant pick up and the voices, both ends of the call hear it as clear as day. These same lines were hooked into a Nortel switch for years with no issues.

 

Phones are eyeBeam 1.5.19.2 and Pollycom Soundpoint 330.

 

Any help would be appreciated as we're on the verge of tearing it out.

 

/Jeff

 

 

Just a thought based on your trouble descrition:

 

Make sure each pair for the telephone lines (PSTN) is not SPLIT.

 

That is, make sure that you have the correct half of each pair from the phone company together.

 

It is possible to have half of of one telephone line and half of another and still get duial tone. That would give you your exact troubles.

 

Trace your pairs right back to the Demarcation Point to be for sure.

 

Bill H

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We've just installed a CS410 - 3.0.1.3023 (Linux) and we are having several issues:

 

1. External caller ID will not come through to any phones but does eventually show up in the logs as below:

 

2007/12/31 19:40:59 Anonymous (anonymous@localhost) Jeff *** (227@localhost) 00:05

2007/12/31 19:41:32 JEFF *** (613*******@localhost) CO4 00:19

 

2. If someone is on a call then the system simply won't pick up consistently, we have 3 PSTN lines connected. (in fxo1 - 3 so the CO4 thing above is confusing)

 

That sounds like there is a problem on the analog side. The only explanation that comes to my mind is that the FXO believes that the caller disconnected the call after the first ring and then calls again. What line is it? Did you already use a tool for measuring out the analog line? Long lines can be a big problem for stable operation (that's why many people move to digital lines).

 

3. Certain companies that use menus (like press 1 for english) are not picking up the user input (I think I may have fixed that with the gain control)

 

Again, if the DTMF seems to be on the edge, it is an indication that the PBX has a problem with the line.

 

4. If someone's on a call, they hear EVERYTHING from any other line, the ring, the auto attendant pick up and the voices, both ends of the call hear it as clear as day. These same lines were hooked into a Nortel switch for years with no issues.

 

Phones are eyeBeam 1.5.19.2 and Pollycom Soundpoint 330.

 

Whow. That almost sounds like there was something with the patch panel.

 

Anyway, all those problem relate to FXO. I would suggest using a tool for measuring out the FXO and/or using a signal amplifier to get the quality under control

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Thanks. I don't have the equipment to check the FXO with any certainty but I got a few phones and ran tests with each line and the crosstalk does not occur where a line (any and each) is removed from the PBX and used for incoming or outgoing calls. The noise and crosstalk are much more pronounced on the inside than the outside. If on a call, and another call comes in, the ringing of the other call comes through as a low humm ticking kind of sound, then a very brief noise sounding like a modem handshake and then the voice of the auto attendant.

 

I've had to revert to the old phone system as no one was able to even have a full conversation without a full disconnect or crosstalk making conversation impossible. As for demarkation, we're in an office building, I'm coming right off the panel less than a foot with standard phone lines to the PBX, the floor demarkation point is only about 30 feet away.

 

Not sure at this point if the box is a dud or I have it horribly misconfigured, I have not deviated a whole lot from the default configuration. I can't run valid tests now until before/after hours.

 

/Jeff

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Thanks. I don't have the equipment to check the FXO with any certainty but I got a few phones and ran tests with each line and the crosstalk does not occur where a line (any and each) is removed from the PBX and used for incoming or outgoing calls. The noise and crosstalk are much more pronounced on the inside than the outside. If on a call, and another call comes in, the ringing of the other call comes through as a low humm ticking kind of sound, then a very brief noise sounding like a modem handshake and then the voice of the auto attendant.

 

I've had to revert to the old phone system as no one was able to even have a full conversation without a full disconnect or crosstalk making conversation impossible. As for demarkation, we're in an office building, I'm coming right off the panel less than a foot with standard phone lines to the PBX, the floor demarkation point is only about 30 feet away.

 

Not sure at this point if the box is a dud or I have it horribly misconfigured, I have not deviated a whole lot from the default configuration. I can't run valid tests now until before/after hours.

 

I think the core problem here is the crosstalk. If we have such a strong crosstalk, then obviously things like DTMF detection become instable and unpredictable. If we are able to solve that problem, then maybe the other problems also go away with this.

 

An internal shortcut between the FXO connectors in the PBX would explain this (that would be clearly a RMA case), but such a production mistake should be extremly rare. I would say if you don't find anything with the crosstalk, send the device back and we have to check if there was anything wrong with this specific device.

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