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Glossary

Telecoms terms and abbreviations can be a little confusing, even for the most experienced engineers. Here’s a short glossary of some of the terms we use.

V

VLR
Visitor Location Register
In a GSM network the VLR stores the data for all mobile stations that are currently staying in the administrative area of the associated MSC - typically there is a VLR per MSC.
VOIP
Voice Over Internet Protocol
Describes the provision of voice services over the packet based Internet Protocol - IP.
VPN
Virtual Private Network