How do I find out the extension number of a phone set

Are you sure you have the correct extension number for the destination? I may be more than "not progammed correctly" - perhaps it isn't the ext# you think it is. Try Feature*0 then all the keys, especially the line keys, which should give you the extension number.

Press PROGRAM press BUTTON press (0 to set a line button, press 1 to set an extension, press 2 for a outside number) Enter the number (line number or extension number or 9 followed by outside number) Press STORE

Guessing you mean add or change extension numbers under the buttons, since you don't "add" or change extension numbers on the phone. From your set, press program dial 99 and the button you want to program. then , dial 1+ ext number and press STORE.

Do that for all the buttons you want to change then pick up the handset and drop it back down to exit programming.

Changing the name and extension number can be done through system admin programming from a phone extension allowed by the class of service assigned to that extension by the phone system installer. Typically the attendant phone is allowed this ability. From the programming phone press **1234(1234 is the default password) to access programming. Once in programming dial 003 for extension numbering then press . Enter the current extension number of the phone you want to change followed by the new extension number then press . Lift the handset to end programming. Access programming again by pressing **1234. Dial 004 for extension name programming then press . Enter the new extension number you programmed then enter the name for the extension. Press then lift handset to end programming.

It is possible that your phone has not been assigned an extension number, in that case system installer programming would need to be accessed to assign the port an extension number. The port number the phone is connected to would have to be determined. This could require tracking the wiring back to where it is connected into the phone system. If this is the case I advise calling a qualified service technician.

To use both the transfer and the intercom it,s necessary to know the extension numbers of the phones your trying to call or transfer to. To find out what the extension number is on those extensions either press feature 00 (if the extension has a display) the extension number will be displayed on the screen, if the set doesn't have a display then you can use the intercom to call a extension that does have a display. To use the intercom press one of the intercom keys below the first two line keys and enter in the extension number of the persons phone you wish to call. To transfer a call, while talking to the caller press the Transfr key(above the hold key) then the extension number of the of the persons phone you wish to call then hang up.

Assign an Extension Number to Your Phone

1 Press program.

2 Press down arrow until the screen displays EXTENSION NO, then press right arrow.

3 Press the up arrow or the down arrow to select the desired extension number (from 11 to 22).

4 Press save store your selection.

NOTE: If you duplicate an extension number, you will hear a repeating
short ring. Repeat Steps 1-4 and assign a different number (from 11 to 22).

Providing set relocation isn't turned on in programming, changing one phone with another will not change the extension number at that location.

press feature *0. you can now look at any button on your phone to see what it is, touching the intercom button will tell you your extension

If she has a working phone, she is set up.

If you want a button to see when she is on the phone, and that calls her when pressed.....First you have to find out her extension number, so just have her call your extension....it will be on the display.

Then, when you know the extension number, at your phone, find a blank button.
Press Feature 00.
Press the button you want to set her up on.
press the LEFT intercom, star (*) and her 2 digit extension number.
when finished, press feature 00 again.

Now, pressing the button, will page her phone.

You need to contact your system admin...