Students Staff

Telephone services

Faults and requests


For faults and requests relating to our telephone services email

We provide the University's main telephone service.

We also manage the contracts for system maintenance and instruct the on-site engineers to deal with infrastructure faults, moves and installation of additional lines.

Here you'll find information about:

  • staff telephones and calling
  • phonebook and switchboard
  • voicemail service
  • requests, faults and moves

Help and information

Our telephone system is a hybrid of traditional analogue POTS, digital technology and IP technology (SIP). We currently supply and support 7 phone models:

  • NEC DT710 (6 button) and DT730 (12 button)
  • DT820 (8 button and 6 button)
  • Doro AUB 200
  • ErgoLine D325 and D330
AUB 200

AUB 200 (analogue).


NEC DT700 (SIP).


NEC DT820 (SIP).


We maintain the University's phonebook. See the main contact phone numbers.

Updating phone and room numbers

Phonebook administrators can use our (on-campus access only) online phonebook manager to change telephone and room numbers for University staff. Please note:

  • The phonebook manager can only be accessed on campus.
  • It can only be used to change telephone and room numbers.
  • It can't be used to change email addresses, names, titles or job titles - these changes need to be made by HR or Registry.
  • Staff with multiple job titles may also have multiple telephone and room numbers, so please take care to only edit the information that's related to the job title you're updating.


The University switchboard is operated by Communications and External Relations. To call the switchboard, dial:

  • Internal: 0
  • External: 01206 87 3333

We provide a central voicemail service which can be accessed by dialling 3467.

On first use you will need to enter the access code 0000, you will then be asked to set up:

  • A personal access code - please use a memorable but difficult to decipher number sequence.
  • A personal greeting - pressing 1 stops the recording and plays the recorded greeting back.
  • A general greeting - pressing 1 stops the recording and plays the recorded greeting back

For more information about voicemail see our first time user set up guide below.

  • Voicemail: first time user set up

    Adobe PDF File
    (278 KB)

    Learn how to:
    - forwarding calls to voicemail
    - review a message at your extension
    - review a message from another phone or an external location

Email if you need to:

  • report a fault
  • request a move
  • request a new extension
  • set up/add to a group
  • change the type of call service available (local/national/international)

When making a request please provide as much of the following information as possible:

  • who to contact regarding the request, including room and extension number, if different from:

  • the extension number(s) and name(s) of user(s) affected by request
  • the room number(s) where the affected extension number is located
  • the socket number the affected telephone(s) are connected to

If a SIP phone is affected please also include the handset's CCSIP number (on underside - hand written or a label) and MAC address (small label behind screen starting 0600).

All requests are prioritised according to University business need.

If a you want to buy an alternative POTS analogue device it must be able to operate on a PABX system, have a recall button facility and have a REN value of 1 (one).

  • Session Initiated Protocol (SIP) phone deployment

    IT Services have planned a gradual migration to new SIP telephones, subject to annual budget approval.

    Our aim is to move 500 extensions per year from analogue or digital extension to a SIP extension.

    The process involves, upgrading the IP network infrastructure, deleting the current extension profile from the analogue exchange, recreating the profile on the SIP server exchange. Thus a period of disruption is to be expected.

    Capital projects and larger scale refurbishments will be used as an opportunity to purchase handsets and facilitate a migration.

    All extension moves require a period of planning and have to observe the service requirements and natural groupings of staff.

    We are deploying NEC handsets based on the following hierarchical criteria:

    1. New buildings
    2. Departmental scale moves – involving 30+ extension moves, not necessarily to refurbished offices.
    3. Major refurbishments of individual offices – complete re wiring
    4. When a clear need is demonstrated – analogue not viable, a health and safety issue etc
    5. Service delivery is affected by not having a SIP phone
    6. Minor office refurbishment
    7. Everyone else

Contact details

Telephone Service (Colchester Campus)