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Configuring Serial Interfaces for E1- and T1-Carrier Lines
Serial Interface: Configuring the Physical Layer
Serial Interface: Configuring the Physical
Layer
Because the external CSU/DSU manages timing, framing, and signaling for the
E1- or T1-carrier line, the serial interface does not have to perform these
functions. Consequently, you do not need to configure options to control these
functions. As a result, the serial interface requires only minimal configuration.
Making the Physical Connection
To connect the serial module to the CSU/DSU, you will need one of the
following cables. (See Figure 5-3.)
■ V.35 cable
■ X.21 cable
■ EIA 530 cable
Figure 5-3. The Serial Module Connects Directly to an External CSU/DSU.
The serial module ships with either a V.35 cable or an X.21 cable.
Note ProCurve Networking does not currently provide an EIA 530 cable.
Wire span
Router (DTE)
Demarc
CSU/
DSU
NIU
(Smart Jack)
Public
Carrier’s CO
Repeater
OCU
Office Channel Unit
(public carrier’s CSU)
LAN
Serial V.35, X.21,
or EIA 530 cable
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