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Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide
78-15827-06B0
Chapter 3 Installing the Router
Connecting the Network Cables
•
The cable length from junction point to the patch panel is determined by the customer.
•
All signals that propagate in the same direction must share the same twisted pair. For example, RX
TIP and RX RING must form a single twisted pair.
•
All unused twisted pairs should be cut flush on both ends of the cable. Any unused wire in a twisted
pair where one wire is in use should be cut flush at both ends.
Connecting the WIC-2A/S Interface Cables
This section describes how to connect the 2-port asynchronous/synchronous (A/S) serial modules
(WIC-2A/S) when using with the MWR 1941-DC router in a Cell Site DCN implementation.
The 2-port A/S serial module has “smart” serial ports. The serial cable attached to one of the module's
ports can determine the electrical interface type and mode (DTE or DCE).
Six types of serial cables (also called serial adapter cables or serial transition cables) are available from
Cisco Systems for use with the 2-port A/S serial module:
•
EIA/TIA-232 serial cable assembly
•
EIA/TIA-449 serial cable assembly
•
V.35 serial cable assembly
•
X.21 serial cable assembly
•
EIA/TIA-530 serial cable assembly
•
EIA/TIA-530A serial cable assembly
All serial cables have a universal plug at the interface module end. The network end of each cable
provides the physical connectors that are most commonly used for the interface. For example, the
network end of the EIA/TIA-232 serial cable is a DB-25 connector, which is the most widely used
EIA/TIA-232 connector.
All serial interface types, except EIA-530, are available in DTE or DCE mode: DTE with a plug
connector at the network end and DCE with a receptacle at the network end. The V.35 assembly is
available in either mode with either gender at the network end. The EIA/TIA-530 assembly is available
in DTE only.
After you install the 2-port A/S serial module, use the appropriate serial cable to connect the serial port
on the module to one of the following types of equipment (see
Figure 3-5
):
•
Synchronous modem
•
DSU/CSU
•
Other DCE, if connecting to a digital WAN line
Stubs
Y-Cable
Patch panel
Junction point
MWR 1941-DC
MWR 1941-DC
95459
E1/
T1
E1/
T1
