If a DTE cable is connected to a port with a clock rate set, the DTE ignores the clock rate and uses the external clock signal that is sent from the remote DCE. Because the serial adapter cables determine the mode and interface type, the PA-8T-V.35 interface becomes a DTE when a DTE cable is connected to it. To use the port as a DTE interface, you need only connect a data terminal equipment (DTE) compact serial cable to the port. To use the port as a DCE interface, you must set the clock rate and connect a DCE compact serial cable.

The internal clock allows you to perform local loopback tests without having to terminate the port or connect a cable. There is no default mode or clock rate set on the PA-8T-V.35 serial ports, although an internal clock signal is present on all ports for data communications equipment (DCE) support.

You can change the default settings with software commands.

The default configuration is for NRZ format and 16-bit CRC. To replace port adapters, you must first remove the Cisco 7304 PCI Port Adapter Carrier Card in the Cisco 7304 router, the Catalyst RSM/VIP2, the Catalyst 6000 family FlexWAN module, or the VIP from the chassis, and then replace port adapters as required.Ĭisco 7100 series, Cisco 7200 series, Cisco uBR7200 series, Cisco 7301 routers, and Cisco 7401ASR routers support OIR of all port adapter types.įigure 1-1 PA-8T-V.35 Port Adapter-Faceplate ViewĪll PA-8T-V.35 serial interfaces support non return to zero (NRZ) and non return to zero inverted (NRZI) format, and both 16-bit and 32-bit cyclic redundancy checks (CRCs). Note Although the Cisco 7304 PCI Port Adapter Carrier Card in the Cisco 7304 router, Catalyst RSM/VIP2, the Catalyst 6000 family FlexWAN module, and the VIP support online insertion and removal (OIR), individual port adapters do not. The compact serial cable attached to the single receptacle determines the mode (DCE or DTE) for all eight interfaces. You must use a V.35 compact serial cable to connect PA-8T-V.35 interfaces to an external data service unit (DSU) or channel service unit (CSU). The V.35 interface is most commonly used in the United States and throughout Europe.Īll eight PA-8T-V.35 interfaces connect to external networks through a single port that has a 200-pin, D-shell receptacle. Each PA-8T-V.35 interface provides full-duplex (FDX) operation at T1 (1.544 Mbps) and E1 (2.048 Mbps) speeds. The PA-8T-V.35 network interfaces provide a direct connection between the high-speed bus in the router and external networks. The Cisco PA-8T-V.35, shown in Figure 1-1, provides up to eight synchronous serial interfaces for the chassis.

Identifying Interface Addresses Port Adapter Overview.

Port Adapter Slot Locations on the Supported Platforms.

This chapter describes the V.35 synchronous serial port adapter (PA-8T-V35) and contains the following sections:

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