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Code Meaning

CFA

Call Forwarding - All Calls

CFB

Call Forwarding - Busy

CFN Call Forwarding - No Answer

HLD

Call on Hold

ICM

Intercom Call

InI

Incoming Call - Internal (within MIT)

InX

Incoming Call - External (outside MIT)

OnL

On Another Line (a call forwarded to your phone because of a No-Answer on the number being called)

OuI

Outgoing Call - Internal (within MIT)

OuX

Outgoing Call - External (outside MIT)

Pck

Call Picked Up

Pri

Priority Call

TiL

Tie-Line Call

Call Forwarding Identification

When you place a call that gets forwarded, a Call Forwarding identifier is displayed (

see above

).

When you receive a call that is being forwarded to you, the display includes the origin of the call, the number of the phone from which
the call is forwarded, and a Call Forwarding identifier.

When you answer a call to an SDN on your desk set, an asterisk (*) after the Call Identifier code means that the PDN phone for that
number is busy.

Appendix: Classes of Telephone Service

Below are descriptions of MIT's classes of phone service, including restrictions on calling. If you are unsure which class of service is on
your phone, check with your department's Administrative Officer, or call your Telephone Support Services Customer Representative. If
you try to place a call outside the restrictions of your service class, you will hear a recording or a fast busy signal.

Class of

Service

Description

A

Completely unrestricted. Can call world-wide without using account numbers. Account numbers can be used to bill a toll
call to a particular MIT account. To call off-campus, press 9 + complete phone number, including area or country codes.

B1

Can call worldwide with an MIT account number. For domestic toll calls, including all Massachusetts area codes, press 191
+ MIT a 1 + area code and phone number. For international calls, press 192 + MIT a 011 + country code
+ city code + phone number.

B2

Can call only within the 617/857 and 781/339 area codes. To call within these area codes, press 9 + phone number. (Class
A or B1 are needed to call the 508/774, 978/351, and 413 area codes.)

C

Restricted to calling only within MIT. Calls outside of MIT require the use of a telephone credit or calling card.

5ESS Digital (ISDN) Telephone User Guide | IS&T

https://ist.mit.edu/services/telephony/isdnguide

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Summary of Contents for 5ESS

Page 1: ...efficient service each MIT department is assigned a Customer Service Representative CSR Your CSR can be reached at 617 253 4357 Telephone HELP Line If you have trouble with telephone or data communications service call the Telephone HELP desk at 617 253 4357 x3 HELP Voice Mail MIT s voice mail system works in conjunction with the 5ESS telephone system Voice mail is a computer based message system ...

Page 2: ...Your PDN is always assigned to a minimum of two CAs on your desk set This means that you can have at least two calls going at once even though your telephone is set up for only one directory number The last CA of a number is reserved for outgoing or intercom calls If your PDN has only two CAs calls can usually come in only on the first CA If you have answered or placed a call on the first CA a sec...

Page 3: ...ge the loudness of the phone s ring whenever you are not on a call You can change the voice level of the receiver or speaker only when you are on a call 1 Press the arrows until you hear the desired volume Left arrow lowers the volume right arrow raises the volume Result Each press adjusts the volume Digital Phone Options The 5ESS and the digital telephone provide optional features and services th...

Page 4: ... the red light of the call appearance CA you will be using is on If you wish to use a different CA press another CA button 1 Lift the receiver or press Result The green light of the CA you selected comes on and you hear the dial tone 2 Dial the telephone number Answering a Call The phone rings and the green light flashes on the CA carrying the call 1 Lift the receiver or press 2 Press the CA butto...

Page 5: ...ng a call and press again Result The call is transferred Placing a Conference Call You can set up a three way conference call from your digital phone with two other parties on or off campus 1 While on the active call press Result The call is held for conference The red light for that CA goes off the green light flutters The next available CA for that DN is selected and its red and green lights com...

Page 6: ...utomatic intercom between two pre determined parties One digit Dial intercom group of up to ten parties Two digit Dial intercom group of up to twenty parties If your desk set is equipped for intercom calling one of its CAs is labeled as an intercom button Intercom calling is an option that you request when ordering new service or changing existing service Destinations and calling codes are set whe...

Page 7: ...igit Intercom Two digit Dial Intercom service includes up to ninety nine parties The intercom destinations are assigned code numbers 01 through 99 1 Lift the receiver or press 2 Press Result The Intercom green light comes on and you hear a stutter dial tone 3 Press and enter the two digit intercom code of the desired party Result Your intercom call is placed Receiving Intercom Calls A single stead...

Page 8: ...ons and gives the codes to activate and cancel each one You can have any combination of call forwarding conditions active at one time however forwarding of all calls supersedes any other active forwarding Forwarding Condition Activate Cancel Unanswered calls your phone rings before it is forwarded Incoming calls encountering a busy signal All calls your phone doesn t ring If you forward unanswered...

Page 9: ...tivate the forwarding of unanswered calls code 78 the system forwards a call after five rings of your telephone or twenty seconds You can change the number of times your phone rings actually the elapsed number of seconds before a call is forwarded In the procedure below enter the number of seconds from the following table to get the desired number of rings before forwarding 1 ring 4 seconds Second...

Page 10: ...lus the off campus phone number to which calls will be forwarded including area code Note You do not press 9 as you would for normal off campus calls Result You hear a confirmation tone of two quick beeps followed by the dial tone The 5ESS places a confirmation call to the forward to number this call does not have to be answered If you don t have off campus calling privileges you hear a fast busy ...

Page 11: ...and want to use two digit speed dialing send email to telephone help mit edu or call 617 253 4357 1 Lift the receiver 2 Enter the Speed Dial Program code 3 Listen for dial tone again If you do not get a dial tone then send e mail to telephone help mit edu or call 3 6370 requesting no charge activation of speed dialing 4 Assign a two digit code from 00 zero zero to 19 If the 2 digit code is already...

Page 12: ...if several phones are near each other 1 Press 2 Press Result You hear the current ring pattern 3 Press Result You hear the next ring pattern Repeat step 3 to hear each successive ring pattern 4 When you hear the ring pattern you want press Result The desk set beeps twice Your phone will now ring with the selected pattern Setting the Clock The date and time are shown on the phone s display panel wh...

Page 13: ...nd the various tones on your desk set If any steps in the test fail or your service is affected call the Telephone Support Services HELP line at x3 4357 x3 HELP 1 Press 2 Press Result The green Message light comes on and a tone begins repeating 3 Lift the receiver and press each button on the telephone Result Each light next to a button should come on You should hear a tone when you press buttons ...

Page 14: ...dentified by a letter On the Model 7506 desk set the nine CAs are designated by the letters a through j On the Model 7507 desk set the thirty CAs are designated by the lowercase letters a through z and the uppercase letters A through D Directory Number When you place a call the display shows the digits as you enter them When you receive a call information on the origin of the call is displayed For...

Page 15: ...ing If you are unsure which class of service is on your phone check with your department s Administrative Officer or call your Telephone Support Services Customer Representative If you try to place a call outside the restrictions of your service class you will hear a recording or a fast busy signal Class of Service Description A Completely unrestricted Can call world wide without using account num...

Page 16: ... computer dial up applications Restricted to placing and receiving calls only within MIT No access to toll operators or tie lines F Generally reserved for lobby phones Restricted to placing and receiving calls only within MIT Access to toll operators and tie lines is allowed Information Services and Technology 617 253 1101 Ask the Help Desk or contact the IS T Webmasters 5ESS Digital ISDN Telephon...

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