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Analog and Student Telephone Features
Call Waiting [Analog Telephones only]
ISDN Digital Telephone Features
Call Forwarding
Telephone Privacy

Note: If you have purchased your own telephone, you may have a "Talk" or flash button that you use instead of the switch hook. However, since these are not standard phones at MIT, we cannot guarantee that these buttons will work.

Analog/Student Telephone Features

To...		Do This...
Put a call on hold		Press switch hook. At dial tone, press 77. Don't hang up.
Return to a held call		Hang up. Phone rings; answer and resume call.
Put a call on hold and place another call		Press switch hook. At dial tone, press 77. At second dial tone, enter phone number.
Alternate between two held calls		Press switch hook. At dial tone, press 77. You are returned to held call.
Transfer a call within MIT		Press switch hook. At dial tone, enter MIT number. When answered, announce transfer and hang up.
Set up a three-way conference call		Place the first call. After the call is answered, press the switch hook. At dial tone, place the second call. After the second call is answered, press the switchhook again. All three parties are connected.
Prevent phone number from being displayed on a digital telephone		Press 65. At second dial tone, enter phone number. Digital phone display shows call as "Private Number."
Answer a call pick-up group phone		When you hear a phone ring in your call pickup group, lift the receiver on your phone and press 61 to connect to the call.

Call Waiting [Analog Telephones only]

To...		Do This...
Use call waiting		Three short beeps signal when a second call comes in. To answer the second call, press the switchhook and press 77. This puts the first call on hold and connects you to the waiting call. To alternate between the two calls, press the switchhook and press 77. To deactivate call waiting before placing a call (so you won't be interrupted), lift the receiver and press 69. At the second dial tone, place your outgoing call. Call waiting is restored when you hang up.

ISDN Digital Telephone Features

To...		Do This...
Put a call on hold		Press the Hold button.
Return to a held call		Press the call button with the flashing green light.
Put a call on hold and place another call		Press the Hold button. Press an unused call button. At the dial tone, enter the number.
Alternate between two held calls		Press the Hold button. Press the call button for the held call.
Transfer a call within MIT		Press the Transfer button. At the dial tone, enter the five-digit MIT extension to which you are transferring the call. When answered, announce the transfer, press the Transfer button again and hang up.
Set up a three-way conference call		Place the first call. After the call is answered, press the Conference button. At the dial tone, place the second call. After the second call is answered, press the Conference button again. All three parties are connected.
Prevent phone number from being displayed on a digital telephone		Press 65. At second dial tone, enter the five-digit MIT extension. Digital phone display shows call as "Private Number."
Answer a call pickup group phone		When you hear a phone ring in your call pickup group, lift the receiver on your phone and press the Call Pickup button to connect the call.

Call Forwarding [Analog and Digital Telephones]

Call Forwarding to an MIT Telephone

To...		Do This...
Forward all calls		Press 72. At dial tone, enter MIT number to which calls will be forwarded. Listen for confirmation tone. Hang up.
Cancel forwarding of all calls		Press 73. Listen for confirmation tone. Hang up.
Forward incoming calls on busy		Press 74. At dial tone, enter MIT number. Listen for confirmation tone. Hang up.
Cancel forwarding on busy		Press 75. Listen for confirmation tone. Hang up.
Forward unanswered calls after five rings		Press 78. At dial tone, enter MIT number. Listen for confirmation tone. Hang up.
Cancel forwarding of unanswered calls		Press 79. Listen for confirmation tone. Hang up.
Change number of rings before forwarding		Press 68 plus two digits from 01 to 60 for number of seconds the telephone rings before forwarding. One ring is approximately four seconds. Listen for confirmation tone. Hang up.

Call Forwarding to an Off-Campus Telephone

Note: Only Faculty/Staff phones that can call off campus (Classes A, B1, B2) can be forwarded to an off-campus number. The only condition available is the forwarding of all calls.

To...		Do This...
Forward all calls to an off-campus number		Get dial tone. Press 72 76. Enter off-campus number to which calls will be forwarded; include the area code, if needed. Listen for confirmation tone of two beeps, followed by the dial tone. Hang up.
Cancel forwarding of all calls		Get the dial tone. Press 73. Listen for confirmation tone of two beeps, followed by the dial tone. Hang up.

Telephone Privacy [Analog and Digital Telephones]

The MIT phone system allows you to set 3 types of Privacy Calling (i.e., suppressing caller ID information) on a specific call; to suppress caller ID information for all calls from your phone, send email to telecom-csr@mit.edu.

If you are making a call, most MIT business phones lines are set up to transmit both your Calling Number and Calling Name to MIT phones that can display this information. Only Calling Number is transmitted on calls placed outside MIT. What is actually displayed on phones outside MIT will vary, based on the called party's service.

If you are receiving a call from another MIT phone, MIT phones with displays will typically show both the Calling Number and the Calling Name ( last name, first name, limited to a total of 12 characters).

To suppress your name on a specific call:

Dial 64, then, after the dial tone, the number you want (e.g., a 5-digit MIT extension, or 9-1-areacode-number). An MIT phone will display the phone number you are calling from, and 'Private Name'.

To suppress your phone number on a specific call:

Dial 65, then, after the dial tone, the number you want (e.g., a 5-digit MIT extension, or 9-1-areacode-number). An MIT phone will display 'Private Number, and the name associated with that phone number.

To suppress both your name and phone number:

Dial 83, then, after the dial tone, the number you want (e.g., a 5-digit MIT extension, or 9-1-areacode-number). An MIT phone will display 'Private'.

If your name is displayed incorrectly, or you want your name or number suppressed for all calls, email telecom-csr@mit.edu.

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