Modem on PBX Phone System Help?

Edwards Finance > Phones

Q. I am attempting to use the modem in our pc in the office. I believe our phone system is called a PBX system and I am not sure what kind of adapter we need to use, if any. The phones themselves have 5 lines that you can choose from by pressing the corresponding button. One phone line goes into the phone. 1. Please advise on what kind of hardware is needed to use the modem on this kind of phone setup. 2. Do we disconnect the phone line from the phone and plug it directly into the modem? Or do we disconnect the handset and connect a line there to plug in to the modem? 3. If we are to disconnect the line from the phone and plug it into the modem directly, how do we choose the telephone line for the modem to use?

A. Most modems will work behind a PBX (or a PABX), as long as the user can get an outside dialtone from the phone without the PABX operator's intervention. The line should go into the modem from the wall socket and then from the modem to the telephone. If the system has a multi-pair cable going to the handset (a lot do with five lines), you'll need to get a separate line installed from the PABX for the modem. It doesn't matter which line is separate.This can even be done at the block where the multi-pair line comes into the office. To use the modem, in the setup, you need to specify what number(s) need to be pushed to get the outside line, if any. Thus done, you should be in business. Most current office phone systems are digital, and modems will NOT work on them -- in fact, the modem can be fried by attaching it to a digital phone line. If you'd bother to READ the ORIGINAL post (rather than getting argumenative, as usual), you'd have seen that the original author specified a "PBX" system. The likelyhood of this being a "digital" system is diminimous. Second, a "digital" system will NOT fry the modem. It won't work, but that's a LONG was from "frying". If you knew anything about telephony, you'd know that the current in the line itself would NEVER fry a modem. But, no, you DIDN'T bother to read the original post. Also, most of the largest corporations that have digital switches also have digital lines to the CO (why be stupid enough to have digital internals, switch to analog, switch back to digital in the CO, etc., or do you think that COs today are analog?). Therefore, if the company had a pure digital system, there wouldn't be a need for a modem AT ALL (modem = modulator/demodulator to switch from analog to digital and vica versa). A simple connector (adaptor) from the serial port to the digital phone line with appropriate software would be enough. However, as most telco "local loops" are still analog (without ordering special circuits from the phone company), so are most PABXs (or EPABX, etc.). But, as I started out, the author specified "PBX", NOT PABX nor EPABX, etc. Name me ONE brand of a "PBX" that is "digital". "many" PBX's (as known by the end user who is not educated in telecom) ARE digital internally with analog to CO (Lucent, Panasonic, Muratec, etc...). and a digital line will fry analog hardware (have seen it fry a fax machine). Speak with your telephone administrator who should be able to give you an analog line from the "PBX" which act like a POTS (plain old telephone service) with a possible exception being having to dial a prefix for an outside line. This should cost next to nothing, compared to a converter for a digital line.

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