Cisco MWR-1941-DC-2T1 Hardware Installation Guide - Page 48
Connecting the WIC-2A/S Interface Cables
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Connecting the Network Cables Chapter 3 Installing the Router • The cable length from junction point to the patch panel is determined by the customer. MWR 1941-DC E1/ T1 Stubs Junction point Patch panel MWR 1941-DC E1/ T1 Y-Cable 95459 • 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 Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide 3-8 78-15827-06B0