To reach IITM telephone extensions from outside, the caller has to dial prefix (044) 2257-xxxx, where xxxx is the PABX number
For residential PABX lines (wherever provided)
- Replace 8xxx with 9xxx
- Replace 4xxx with 6xxx
If residential line is not provided "Number Not Available" or Engaged Tone will be heard.
Board PABX No : IVRS (8000) / ASR (9000)
The full format of the email is [Email]@iitm.ac.in
List of Intercom Extensions
| NAME | ROLE | BUILDING | ROOM NO. | BUILDING NAME | OFFICE EXTN (PABX). | |
|---|---|---|---|---|---|---|
| Optical Network Lab | FOSAPP | Electrical Sciences Block | 5450 | |||
| Optics & Spectroscopy Lab | HSB | 305 | Department of Humanities and Social Sciences Block | 5877 | ||
| Optics Lab | HSB | 329 | Department of Humanities and Social Sciences Block | 5871 | ||
| Organic Research Lab 1 | CYB | 103 | Department of Chemical Engineering | 5221 | ||
| Organic Research Lab 2 | CYB | 119 | Department of Chemical Engineering | 5222 | ||
| Organic Research Lab 3 | CYB | 201 | Department of Chemical Engineering | 5223 | ||
| Organic Research Lab 4 | CYB | 202 | Department of Chemical Engineering | 5224 | ||
| Organic Research Lab 5 | CYB | 115 | Department of Chemical Engineering | 5225 | ||
| Organic Research Lab 6 | CYB | 308 | Department of Chemical Engineering | 5210 | ||
| Orthopaedic/Surgical/Urology/Plastic Surgeon | HSP | 107 | IITM Institute Hospital | 8314 | ||
| OUT Gate | OUG | 8268 | ||||
| Out gate Main Substation | OUT Gate | 8179 | ||||
| Owzone Enquiries | Ladies Club | 1 | Ladies Club | 9450 | ||
| Owzone Shed 1 | Near C2 Block Shopping Center | Shopping Center | 9451 | |||
| Owzone Shed 2 | Near Himalayas Backside | Himalayas Mess | 9452 | |||
| Owzone Shed 3 | Near Velachery Gate | Velachery Gate | 9453 | |||
| Owzone Shed 4 | Near Nilgiri Mess | Nilgiri Mess | 9456 | |||
| Owzone Shed 5 | Near Sivan Temple Backside | Sivan Temple | 9454 | |||
| PA System Facilities | CEC | Central Electronics Center | 4949 | |||
| Paanini Meeting Room - MR2 | CSB | 28 | Computer Sciences Block | 5391 |