CSIS 160
Josh Ancel
Chapter 6 Terms
1. Message
Telecommunications Service (MTS) - is the official designation for long
distance, or toll , calls. It is a tow way , interexchange communication for voice, data, facsimile,
image and other forms of intelligence.
2. Wide Area
Telecommunications Service(WATS)- is a discounted MTS offering. Because the
subscriber commits to using long distance facilities in advance, the rates are
cheaper than the regular MTS toll rates.
3. Exchange
Telecommunications Service- the term used for local or nontoll calling.
4. Inside Plant-
facilities used to bring services to the CPE and is Located at the CO
5. Outside
Plant(OSP)-facilities used to bring services to the CPE and is Located outside
the CO
6. Feeder
Cables- the cables connecting CO's to OSP's and CEV's etc.
7. Distribution
Cables-feeder cables are devided in to smaller bundles called Distribution
Cables
8. Jumper wires-
used to cross connect feeder blocks and distribution block. Done by placeing
between terminal blocks.
9. Line-The
communication path that connects subscribers CPE to a switching system.
10. Trunk-The communications path that connects two switching systems
11. Trunk Circuit-a constance interface between the switch and the
transmisson facility.
12. Network Interface Device (NID)-The device that the LEC uses to protect and communicate with the
CPE.
13. Closure- is used to achieve a physical connections of the drop to the
distribution facility
14. Ready access splice case- is when the closure is supported by an aerial
cable
15. CEV-Controlled Environmental Vaults- Under ground chambers that have the
OSPs cross connect terminal cabinets in them.
16. Service Entrance-the physical entry of feeders in to the CO building.
17. Toll Tandems-Tandems that are involved with setting up connections for
toll calls over long distances where direct end office trunks cant exist.
18. Multiplexing-superimposeing several conversations simultaneously on a
single physical communication path by means of transmission system.