Cisco 7940 phone problem setting up

[erniefishman]

I am VERY new to using the Cisco 7940 IP phone in an office environment. The phone works fine and I like it very much HOWEVER I am going crazy trying to hook up my computer's modem so that I can utilize the modem and WinFax Pro software so I can send faxes directly from the computer. Modem is fine and when I run the hardware manager it gets a dial tone., but when I try to send a fax it says there is no dial tone.

I am hooking up the modem to the back of the phone in the 'AUX' jack.

Anyone have a suggestion??

[paolo bevilacqua]

The 7940 does not have a port to connect a modem or a fax. actually, no cisco phone has one such port.

To connect modems, fax and analog phones to VoIP networks you need to use adapters, often called ATA's, from many manufactures including cisco.

Although, I could not exclude that using an appropriate impedance adapter, one would we able to send fax or low speed modem using the headset port. You would not be able to dial but have to press the headset button once the call is dialed from keypad.

Such an use of the headset port would not be supported by cisco, however.

[Rob Huffman · Accepted solution]

Hi Ernie,

Just to add a little to Paolo's good info, the Aux port is used for a console connection and unfortunately won't work for your Fax/Modem :( Have a look;

Cable Specifications

RJ-9 jack (4-conductor) for handset and headset connection.

**RJ-11 jack for console access (labeled AUX or RS232)**.

RJ-45 jack for the LAN 10/100BaseT connection (labeled LAN).

RJ-45 jack for a second 10/100BaseT compliant connection (labeled PC).

48-volt power connector. The diameter of the center pin in the phone power jack (Switchcraft 712A) is 0.1 in. (2.5 mm). The center pin is positive (+) voltage. The miniature power plug required to mate with the power jack on the phone is a Switchcraft 760 or equivalent.

From this doc;

Cisco IP Phone Model 7960G and 7940G Administration Guide for Cisco CallManager

http://www.cisco.com/en/US/products/hw/phones/ps379/products_administration_guide_chapter09186a008024d84c.html

For your Fax/Modem service you may want to use;

Cisco ATA 180 Series Analog Telephone Adaptors

The Cisco ATA 180 series are mixed-environment adaptors that interface legacy analog telephones, fax machines, analog conference telephones and other analog devices to IP based telephony networks thereby allowing companies to protect their investments in analog phones, fax machines, and speakerphones.

From this doc;

http://www.cisco.com/en/US/products/hw/gatecont/ps514/index.html

Hope this helps!

Rob

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[erniefishman]

thanks for your responses. the office people here are going to be installing a device like what you described shortly. they said they've had to do it before for other people... just wish they would have said something sooner.