Yale campus, local and long distance calls can be made using your office phone. See instructions below for differnt dialing locations.
| To Call Yale Campus Numbers | Dial |
| Central Campus and Science Hill numbers | last 5 digits |
| Medical Center Numbers | last 5 digits |
| To Call Local Numbers (with a 203 area code) | Dial |
| Local numbers | 9 + (203) + 7 digits |
| Connecticut Mental Health Center (CMHC) | 9 + (203) 789-7300 |
| To Call Long Distance Numbers | Dial |
| Long distance, in-state (YALENET) | 9 + 1 + area code + 7 digits |
| Long distance, out-of-state (YALENET) | 9 + 1 + area code + 7 digits |
| Long distance, in-state (personal credit card, bill to third number, collect) |
9 + 0 + area code + 7 digits |
| Long distance, out-of-state (personal credit card, bill to third, collect) |
9 + 0 + area code + 7 digits |
| International (YALENET) | 9 + 011 + country code + city code** + number |
| International (personal credit card, bill to third, collect) |
9 + 01 + country code + city code** + number |
| Toll-free (800) numbers | 9 + 1 + 800+ 7 digits |
For additional dialing instructions, visit the Campus Phone webpage.