Specifications

Mediatrix 4100 235
A PPENDIX
E
Glossary
10 BaseT
An Ethernet local area network that works on twisted pair wiring.
100 BaseT
A newer version of Ethernet that operates at 10 times the speed of a 10 BaseT Ethernet.
Access Device
Device capable of sending or receiving data over a data communications channel.
A-Law
The ITU-T companding standard used in the conversion between analog and digital signals in PCM (Pulse
Code Modulation) systems. A-law is used primarily in European telephone networks and contrasts with the
North American mu (µ)-law standard. See also mu (µ)-law.
Analog Display Services Interface (ADSI)
Telecommunications protocol standard that enables alternate voice and data capability over the existing
analog telephone network. This means that in addition to the familiar voice response audio interface (where
you listen to voice recordings and make menu selections using the telephone keypad), you can now see the
menu and information on the screen display and make selections using soft keys. To use ADSI, you would
need an ADSI capable device (as you would if you want the caller ID service).
Area Code
The preliminary digits that a user must dial to be connected to a particular outgoing trunk group or line. In North
America, an area code has three digits and is used with a NXX (office code) number. For instance, in the North
American telephone number 561-955-1212, the numbers are defined as follows:
Outside North America, the area code may have any number of digits, depending on the national
telecommunication regulation of the country. In France, for instance, the numbering terminology is xZABPQ
12 34, where:
Table 162: North American Numbering Plan
No. Description
561 Area Code, corresponding to a geographical zone in a non-LNP (Local Number Portability)
network.
955 NXX (office code), which corresponds to a specific area such as a city region.
1212 Unique number to reach a specific destination.
Table 163: France Numbering Plan
No. Description
x Operator forwarding the call. This prefix can be made of 4 digits.
Z Geographical (regional) zone of the number (in France, there are five zones). It has two digits.
ABPQ First four digits corresponding to a local zone defined by central offices.
12 34 Unique number to reach a specific destination.