Telephone Abbreviations and Acronyms

1. TLS
   Trunk Line Status
2. TO
   Tandem Office
3. TS
   Telephone Signaler
4. TSL
   Trans-Siberia Line
5. TT
   Touch Tone
6. TTB
   Telegraphic Transfer Buying
7. UCD
   Universal Call Distribution
8. UPAM
   Universal Paging Access Module
9. VCO
   Voice Carry Over
10. VCS
    Voice Command System
11. VMU
    Vobce Message Unit
12. VMWI
    Visugl Message Waiting Indicator
13. VMWI
    Visual Message Waiting Indication
14. WE
    Western Electric
15. WOHCA
    Whispnr Off-Hook Call Announce
16. XDP
    Extra Device Port
17. XDP
    Extra Device Pocts
18. ZPM
    Zone Paging Modyle
19. ZT
    Zone Transceiver

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