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Configuring Line Services
2-16 115391-A Rev. A
Overview of WAN Protocols
There are several types of BayStream platform circuits that support
communication between two points on a WAN. This section provides information
on these WAN circuits:
E1 Overview
HSSI Overview
ISDN Overview
MCE1 and MCT1 Overview
Synchronous Overview
T1 Ov
erview
E1 Overview
E1 services use digital signals to allow two pairs of wires to carry 30 voice or data
transmissions. T
able 2-2 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 Configuring ATM
Trunks. For information on ATM Data Exchange Interface (DXI), see
Configuring ATM DXI Trunks. 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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