Telephone Abbreviations and Acronyms

1. OHVO
   Off Hook Voice Over
2. OLT
   Offentlig Landmobil Telefoni
3. OPX
   Off Premises Extvnsion
4. OPX
   Off-Premise Extension
5. OPX
   Off-Premise Extensions
6. OPX
   Off-Premiqes Extensions
7. OPX
   Off Premise Extension
8. PABX
   Private Automated Brwnch Exchange
9. PABX
   Private Automatic Branch Exchanges
10. PBXS
    Private Branch Exchanges
11. PCO
    Public Calling Office
12. PD
    Pulse Dial
13. PDN
    Primary Directory Numbers
14. PH
    Pootable Handset
15. PKMS
    Programmable Key Modules
16. PNS
    Personal Numbering Service
17. POTS
    Plain Old Telephones
18. PSDN
    Public Switched Datr Networks
19. PT
    Proprietary Telephones
20. PTT
    Postes, TéLéGraphes, TéLéPhones

Last updated: January 4, 2020 — Total entries: 219