General Information
Dialing Instructions
DIALING INSTRUCTIONS
All Emergencies
- Dial x3333
To make internal calls
- Dial 4-digit extension number
To call Columbia University and associated institutions via voice tie lines
- Dial 71 + 4 + four digit extension when dialing 854 exchange
- Dial 71 + 3 + four digit extension when dialing 853 exchange
To call Columbia University via tie lines for modem connections to CUNIX and the Internet
- Dial 714-3100
To make local calls
- Dial 9 and telephone number
To make domestic long distance calls
- Dial 9, 1, area code, and telephone number
To make international calls
- Dial 9 for outside line
- Dial 011 for international access code
- Dial foreign country code
- Dial local city code
- Dial local telephone number
- Allow 45 seconds for ring to begin
Foreign country and city codes can be found via online search by " country code listing".
Assistance
- Dial 0 for the TC Operator during normal business hours, Mon. - Fri. 9:00 am - 5:00 pm
Telephone Repair and Service
For breakdowns and other service repairs call ext. 3456 during normal business hours Mon.-Fri.
- For breakdowns or other service repairs (after normal business hours) dial ext.3777 for Security