114 telephone number inquiry
BTN Billing Telephone Number
Chinese telephone number-input technology
incoming telephone number show
NSTN Non Standard Telephone Number
Selection or Change of Telephone Number
Telephone Number Assignment System
telephone number memory device
telephone number resources
Telephone Number Upgrade
VAX telephone number inquiry system
video-telephone， viewphone， visual telephone
combination of pole number with slot number
Even-number-mode-odd-number-order equal-order N-th power H-sque