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CHAPTER 1
Overview
This chapter describes the PA-4T port adapter and contains the following sections:
• Port Adapter Overview, page 1-1
• Synchronous Serial Overview, page 1-2
• LEDs, page 1-3
• Cables, Connectors, and Pinouts, page 1-4
• Port Adapter Slot Locations on the Supported Platforms, page 1-13
• Identifying Interface Addresses, page 1-15
Port Adapter Overview
The PA-4T, shown in Figure 1-1, provides four channel-independent, synchronous serial ports that
support full-duplex operation a
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Chapter 1 Overview Synchronous Serial Overview Synchronous Serial Overview The PA-4T supports the following interface types: EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA-530. EIA/TIA-232, which is by far the most common interface standard in the United States, supports unbalanced circuits at signal speeds up to 64 kbps. EIA/TIA-449, which supports balanced (EIA/TIA-422) and unbalanced (EIA/TIA-423) transmissions, is a faster (up to 2 Mbps) version of EIA/TIA-232 that provides more functi
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Chapter 1 Overview Synchronous Serial Specifications Synchronous Serial Specifications The PA-4T provides up to four synchronous serial interfaces. Each interface allows a maximum bandwidth of 2.048 Mbps; the speed depends on the type of electrical interface used. Use EIA/TIA-232 for speeds of 64 kilobits per second (kbps) and below, and use X.21, EIA/TIA-449, V.35, or EIA-530 for higher speeds. Serial signals can travel a limited distance at any given bit rate; generally, the slower the
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Chapter 1 Overview Cables, Connectors, and Pinouts The green enabled LED on the port adapter indicates that the motherboard is enabled and receiving power, and that the port adapter is ready for operation. The following conditions must be met before the enabled LED goes on: • The PA-4T interface is correctly connected and receiving power • The PA-4T-equipped card or router contains a valid microcode version that has been downloaded successfully • The bus recognizes the PA-4T or PA-4T-equi
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Chapter 1 Overview Cables, Connectors, and Pinouts The network end of the cable is an industry-standard connector for the type of electrical interface that the cable supports. For most interface types, the adapter cable for DTE mode uses a plug at the network end, and the cable for DCE mode uses a receptacle at the network end. Exceptions are V.35 adapter cables, which are available with either a V.35 plug or a receptacle for either mode, and the EIA-530 adapter cable, which is available
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Chapter 1 Overview Cables, Connectors, and Pinouts Figure 1-3 Serial Port Adapter Cables (PA-4T port adapter) Router connections EIA/TIA-232 EIA/TIA-449 V.35 X.21 EIA-530 Network connections at the modem or CSU/DSU Metric (M3) thumbscrews are included with each port adapter cable to allow connections to devices that use metric hardware. Because the 4T port adapter uses a special, high-density port that requires special adapter cables for each electrical interface type, we recommend that y
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Chapter 1 Overview Cables, Connectors, and Pinouts Figure 1-4 EIA/TIA-232 Adapter Cable Connectors DTE DCE EIA/TIA-449 Connections The router (VIP) end of all EIA/TIA-449 adapter cables is a high-density 60-pin plug. The opposite (network) end of the adapter cable provides a standard 37-pin D-shell connector, which is commonly used for EIA/TIA-449 connections. Figure 1-5 shows the connectors at the network end of the adapter cable. EIA/TIA-449 cables are available as either DTE (DB-37 plu
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Chapter 1 Overview Cables, Connectors, and Pinouts X.21 Connections The router (VIP) end of all X.21 adapter cables is a high-density 60-pin plug. The opposite (network) end of the adapter cable is a standard DB-15 connector. Figure 1-7 shows the connectors at the network end of the X.21 adapter cable. X.21 cables are available as either DTE (DB-15 plug) or DCE (DB-15 receptacle). Figure 1-7 X.21 Adapter Cable Connectors DTE 8 1 DCE 15 9 EIA-530 Connections The EIA-530 adapter cable is a
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Chapter 1 Overview Cables, Connectors, and Pinouts Table 1-3 EIA/TIA-232 Adapter Cable Signals DTE Cable (CAB-232MT=) DCE Cable (CAB-232FC=) 1 VIP End, HD Network End, VIP End, HD Network End, 60-Position Plug DB-25 Plug 60-Position Plug DB-25 Receptacle Signal Pin Pin Signal Signal Pin Pin Signal Shield ground 46 1 Shield ground Shield ground 46 1 Shield ground TxD/RxD 41 —> 2 TxD RxD/TxD 36 <— 2 TxD RxD/TxD 36 <— 3 RxD TxD/RxD 41 —> 3 RxD RTS/CTS 42 —> 4 RTS CTS/RTS 35 <— 4 RTS CTS/RTS
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Chapter 1 Overview Cables, Connectors, and Pinouts Table 1-4 EIA/TIA-449 Adapter Cable Signals DTE Cable (CAB-449MT=) DCE Cable (CAB-449C=) 1 VIP End, HD Network End, VIP End, HD Network End, 60-Position Plug DB-37 Plug 60-Position Plug DB-37 Receptacle Signal Pin Pin Signal Signal Pin Pin Signal Shield ground 46 1 Shield ground Shield ground 46 1 Shield ground TxD/RxD+ 11 —> 4 SD+ RxD/TxD+ 28 <— 4 SD+ TxD/RxD– 12 —> 22 SD– RxD/TxD– 27 <— 22 SD– TxC/RxC+ 24 <— 5 ST+ TxCE/TxC+ 13 —> 5 ST+
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Chapter 1 Overview Cables, Connectors, and Pinouts Table 1-5 EIA-530 DTE Adapter Cable Signals (CAB-530MT=) 1 VIP End, HD Network End, 60-Position Plug DB-25 Plug Signal Pin Pin Signal Shield ground 46 1 Shield ground TxD/RxD+ 11 —> 2 TxD+ TxD/RxD– 12 —> 14 TxD– RxD/TxD+ 28 <— 3 RxD+ RxD/TxD– 27 <— 16 RxC– RTS/CTS+ 9 —> 4 RTS+ RTS/CTS– 10 —> 19 RTS– CTS/RTS+ 1 <— 5 CTS+ CTS/RTS– 2 <— 13 CTS– DSR/DTR+ 3 <— 6 DSR+ DSR/DTR– 4 <— 22 DSR– DCD/DCD+ 5 <— 8 DCD+ DCD/DCD– 6 <— 10 DCD– TxC/RxC+ 24
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Chapter 1 Overview Cables, Connectors, and Pinouts Table 1-6 V.35 Adapter Cable Signals DTE Cable (CAB-V35FT= or CAB-V35MT=) DCE Cable (CAB-V35FC= or CAB-V35MC=) 1 VIP End, HD Network End, VIP End, HD Network End, 34-Position Plug 34-Position 60-Position Plug 60-Position Plug Receptacle Signal Pin Pin Signal Signal Pin Pin Signal Shield ground 46 A Frame ground Shield ground 46 A Frame ground Circuit ground 45 B Circuit ground Circuit ground 45 B Circuit ground RTS/CTS 42 —> C RTS CTS/RTS
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Chapter 1 Overview Port Adapter Slot Locations on the Supported Platforms Table 1-7 X.21 Adapter Cable Signals DTE Cable (CAB-X21MT=) DCE Cable (CAB-X21FC=) 1 VIP End, HD Network End, VIP End, HD Network End, 60-Position Plug DB-15 Plug 60-Position Plug DB-15 Receptacle Signal Pin Pin Signal Signal Pin Pin Signal Shield ground 46 1 Shield ground Shield ground 46 1 Shield ground TxD/RxD+ 11 —> 2 Transmit+ RxD/TxD+ 11 —> 2 Transmit+ TxD/RxD– 12 —> 9 Transmit– RxD/TxD– 12 —> 9 Transmit– RTS/
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5 3 1 Chapter 1 Overview Port Adapter Slot Locations on the Supported Platforms Figure 1-9 Port Adapter Slots in the Cisco 7206 Port adapter slot 5 Port adapter slot 6 Port adapter slot 3 Port adapter slot 4 Port adapter slot 1 Port adapter slot 2 Port adapter slot 0 VIP Slot Numbering Figure 1-10 shows a partial view of a VIP motherboard with installed port adapters. With the motherboard oriented as shown in Figure 1-10, the left port adapter is in port adapter slot 0, and the right port
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Chapter 1 Overview Identifying Interface Addresses Figure 1-11 Interface Slot Numbers—Cisco 7505 Shown VIP in interface processor slot 3 Slot 3 Interface Slot 2 processor Slot 1 slots Slot 0 Identifying Interface Addresses This section describes how to identify interface addresses for the PA-4T in supported platforms. Interface addresses specify the actual physical location of each interface on a router or switch. Interfaces on the PA-4T installed in a router maintain the same address re
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Chapter 1 Overview Identifying Interface Addresses Cisco 7200 Series Routers Interface Addresses This section describes how to identify the interface addresses used for the PA-4T in Cisco 7200 series routers. The interface address is composed of a two-part number in the format port-adapter-slot-number/interface-port-number. See Table 1-8 for the interface address format. In Cisco 7200 series routers, port adapter slots are numbered from the lower left to the upper right, beginning with po
