Internal, local and national calls can be made from all College phones (including phones in Halls of residence) for free. 

All other calls are chargeable. For more information read the telephone call rates tariff [PDF 560kb]  

Your phone may be restricted due to your Class of Service. You will either have local, national or international call permissions from your extension.  To find out what call permissions you have, log in to the telephony self-service service tool. To change your call permissions, contact your Telecoms Representative.

If you are in Halls of Residence, to make chargeable calls you will require a phone card. We recommend the Post Office’s phone card. 

Making calls

External call

Dial 9 followed by the full telephone number you require, including the dialling code, to make an external call for business purposes.

Internal call to a recipient at the same campus

Dial the five-digit extension number you require to make an internal call to a recipient based at the same Imperial campus as you or dial 0 to reach your local operator for directory assistance. You can look someones telephone number on Microsoft Outlook Properties or search the College Directory.

Internal call to a recipient at another campus

If you wish to call a colleague working at another campus, follow the instructions below.

  1. Click the campus you are dialling from below.
  2. Find the campus your colleague is based at in the list.
  3. Follow the instructions below:

Calling from:

South Kensington/Silwood Park Campus

Dial 6 followed by the extension number of the person you wish to contact when calling from South Kensington/Silwood Park Campus to:

  • Chelsea and Westminster
  • Charing Cross (except the Reynolds Building)
  • Hammersmith (except IRDB and Burlington Danes)
  • St Mary’s (except 59-61 and Norfolk place).

Dial 66 followed by the extension number of the person you wish to contact for the Royal Brompton Campus.

Chelsea & Westminster Campus

Dial 445 followed by the extension number of the person you wish to contact at South Kensington/Silwood Park Campus.

Dial the extension number of the person you wish to contact for:

  • Charing Cross Campus (except the Reynolds Building)
  • Hammersmith Campus (except IRDB & Burlington Danes)
  • St Mary's Campus (except 59-61 NWR & Norfolk Place)

Dial the full number including dialling code, of the person you wish to contact at Royal Brompton Campus.

Charing Cross Campus (except the Reynolds Building)

Dial 445 followed by the extension number of the person you wish to contact at South Kensington/Silwood Park Campus.

Dial the extension number of the person you wish to contact at:

  • Chelsea and Westminster Campus
  • Hammersmith Campus (except IRDB & Burlington Danes)
  • St Mary's Campus (except 59-61 NWR & Norfolk Place).

Dial the full number including dialling code, of the person you wish to contact at Royal Brompton Campus.

Hammersmith Campus (except IRDB & Burlington Danes)

Dial 445 followed by the extension number of the person you wish to contact at South Kensington/Silwood Park Campus.

Dial the extension number of the person you wish to contact at:

  • Charing Cross Campus (except the Reynolds Building)
  • Chelsea and Westminster Campus
  • St Mary's Campus (except 59-61 NWR & Norfolk Place)

Dial the full number including dialling code, of the person you wish to contact at Royal Brompton Campus.

Royal Brompton Campus

Dial 13 followed by the extension number of the person you wish to contact at South Kensington/Silwood Park Campus.

Dial the full number including dialling code, of the person you wish to contact at:

  • Chelsea & Westminster Campus
  • Charing Cross Campus (except the Reynolds Building) Hammersmith Campus (except IDRB & Burlington Danes)
  • St Mary's Campus (except 59-61 NWR & Norfolk Place).

St Mary's Campus (except 59-61 NWR & Norfolk Place)

Dial 74 followed by the extension number of the person you wish to contact at South Kensington/Silwood Park Campus

Dial the extension number of the person you wish to contact at:

  • Chelsea & Westminster Campus
  • Charing Cross Campus (except the Reynolds Building)
  • Hammersmith Campus (except IRDB & Burlington Danes)

Dial the full number including dialling code, of the person you wish to contact at Royal Brompton Campus.

Block unwanted calls

if you wish to block unwanted calls to your College phone, please contact the ICT Service Desk

Cisco phone user guides

User guides for all Cisco phones used at the College can be found below. The model number of your phone can be found on the label on the back of the phone.

Halls of residence phones 

Staff phones

Reboot your phone

Before contacting the ICT service desk with a telephony fault, we recommend rebooting your phone to resolve the issue. This can be done by unplugging the patch lead out the back of the phone, waiting 30 seconds and plugging it back in. It will take a few minutes for your phone to reboot fully.

Billing

If you would like a copy of your College telephone bill, please contact your Telecoms Billing Representative

If you would like to change the billing name, please submit the change of billing name to your Telecoms Representative who will log in on your behalf