| Abbreviation | Definition |
|---|---|
| PSQM | Perceptual Speech Quality Measure |
| PSS | Phone Search Space |
| PST | Public Safety Telecommunications |
| PSTN | Public Switched Telecommunications Network |
| PSTN | Public Switched Telephony Network |
| PSX | Power System Exchange |
| PTA | Pakistan Telecommunication Authority |
| PTA | Pre-Transmission Audit |
| PTAM | Professional Telephone Answering Machine |
| PTC | Pacific Telecommunications Council |
| PTC | Pakistan Telecommunication Corporation |
| PTC | Pots Tandem Centrex |
| PTC | Prakash Telecom Corporation |
| PTCL | Pakistan Telecom Company Limited |
| PTCL | Pakistan Telecommunication Company Ltd |
| PTCL | Pakistan Telecommunication Company, LTD. |
| PTCL | Pakistan TeleComunication Land-line |
| PTCM | Pragmatic Trellis Coded Modulation |
| PTE | Path Terminating Equipment |
| PTET | Pakistan Telecommunication Employees Trust |