Item Description
Gauge
l E1 75-ohm unbalanced coaxial cable: 30 AWG
l E1 120-ohm or T1 100-ohm balanced twisted pair
cable: 26 AWG
Cores
l E1 75-ohm unbalanced coaxial cable:
SYFVZP-75-1-1*4
l E1 120-ohm or T1 100-ohm balanced twisted pair
cable: SEYVP-120
6.8 Synchronous/Asynchronous Serial Interface Cables
This section describes the categories, structure, and technical specifications of the synchronous/
asynchronous serial interface cable.
Introduction
A synchronous/asynchronous serial interface cable is connected as follows:
l The DB28 connector is connected to the DB28 port on a card.
l Another end depends on the connected device:
– If the wide area network (WAN) uses the DDN line, the cable is connected to the CSU/
DSU.
– If the WAN uses the dial-up line, the cable is connected to the modem.
Cable Category
CAUTION
Verify that devices are connected using appropriate synchronous/asynchronous serial interface
cables. Appropriate cable type is determined based on device connection mode (such as
synchronous/asynchronous and DTE/DCE modes), signals used by the connected device, baud
rate, and clock.
Table 6-16 lists the categories of synchronous/asynchronous serial interface cables.
Table 6-16 Categories of synchronous/asynchronous serial interface cables
Cable
Local End Connector Network-side Connector
V.24 DTE cable DB28 connector DB25 (male) connector
V.24 DCE cable DB25 (female) connector
V.35 DTE cable DB28 (male) connector
Huawei AR1200&2200&3200 Series Enterprise Routers
Hardware Description 6 Cables
Issue 03 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
148
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