Making Calls with VoIP Phones
Description:
This article provides the telephone prefixes assigned to CSU users and dialing instructions when using VoIP phones and other analog devices.
Note: This information applies to making calls using VoIP phones. For information on using Teams Voice, see Getting Started with Teams Voice: Making and Receiving Calls.
Applicable to:
- Fort Collins faculty and staff who use VoIP phones and other analog devices
CSU Prefixes
CSU telephone numbers are assigned within the following range of telephone prefixes:
Area Code
Prefix
Extension
970
297
0300-0399, 1200-1299, 3600-3799, 4000-4599
970
491
0000-8999
970
492
4000-4999, 8000-8999, 9000-9999
970
495
2000-2999, 3500-4499, 5000-6199
Dialing Instructions
Dial only the last five digits (7+xxxx, 1+xxxx, 2+xxxx, 5+xxxx) when calling from campus. All numbers are in the 970 area code.
CSU Phone Numbers
Dial 5 digits of the University number (1+xxxx, 7+xxxx, 2+xxxx, 5+xxxx)
Non-CSU Phone Numbers & Long Distance
Dial 1 + Area Code + 7-digit number for all off-campus calls (1+xxx-xxx-xxxx)
* Please note that Guam is part of the US dialing plan.
Faxing and other Analog devices
Dial 8 + 1 + Area Code + 7-digit number for all off-campus calls (81xxxxxxxxxx)
International Calls
Dial 8+011, country code, city code, and telephone number. For international calls using a calling card, dial 8+00, and the operator will connect you to an international operator.
Toll-Free
Dial 1 + area code + 7-digit number
Related Resources
-
Relay Colorado: a statewide service that connects standard (voice) telephone users with Deaf, Hard of Hearing, DeafBlind, Speech-Disabled, or Late-Deafened people who use Teletypewriter (TTYs) or Voice Carry-Over (VCO) phones.
- CSU Directory