Avaya Configuring Line Services Bedienungsanleitung Seite 51

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About Line Protocols
114078 Rev. A 2-15
Overview of WAN Protocols
There are several types of router circuits that support communication between two
points on a WAN. This section provides information on these WAN circuits:
E1 Overview
HSSI Overview
ISDN Overview
Link Access Procedure Balanced (LAPB) Protocol Overview
MCE1 and MCT1 Overview
Synchronous Overview
T1 Overview
E1 Overview
E1 services use digital signals to allow two pairs of wires to carry 30 voice or data
transmissions.
Table 2-3 shows the specification for an E1 line.
E1 services (2.048 CEPT) are the European equivalent of T1 services, and operate
in a similar fashion. See “T1 Overview” for more information.
Note: For information on ATM ARE or FRE-2 circuits, see the Configuring
ATM Services guide. For information on ATM Data Exchange Interface (DXI),
see Configuring ATM DXI Services. ATM DXI operates over HSSI or
synchronous interfaces.
Table 2-2. Specification for E1 Line
Attribute Value
Framing rate 8000 frames/s
Channels per frame 32
Line speed 2.048 Mb/s
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