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2-12 Cisco 2500 Series Multiport Serial Router User Guide
Network Connection Considerations
Network Connection Considerations
This sections describes important cabling information that must be considered before
making your network connections. The Ethernet or Token Ring ports are used to connect
to a LAN; the synchronous serial ports are used to connect to a WAN; and the asynchronous
ports are used to provide remote access to the multiport serial routers.
Ethernet Connections
The Ethernet ports are located on the rear panel of the Cisco 2520 (labeled ETHERNET 0
AUI and UTP) and Cisco 2522 (labeled ETHERNET 0 AUI and 10BT) multiport serial
routers. Both ports are active, but only one can be used at a time. If both ports are connected,
the 10BaseT port is active.Use an Ethernet transceiver to connect multiport serial routers
directly to the network.
You can use the following equipment to connect to the Ethernet AUI port:
• An Ethernet AUI cable connected to a transceiver
• An Ethernet transceiver connected directly to the multiport serial router’s AUI port
The connection to the AUI port can be made using either slide latch connectors or
jackscrew connectors
Note Ethernet cables are not shipped as standard with the multiport serial routers.
The 10BaseT port is connected to the Ethernet through the twisted-pair wiring, and is
modular in design.
Token Ring Connections
The two Token Ring ports are located on the rear panel of the Cisco 2521 and Cisco 2523
and are labeled TOKEN RING or UTP. The port labeled TOKEN RING uses a standard
9-pin Token Ring lobe cable and connects the multiport serial router directly to a media
- About This Guide 1
- Organization 2
- Conventions 2
- Overview of the Router 5
- Hardware Features 6
- Overview of the Router 1-3 7
- Overview of the Router 1-5 9
- System Specifications 10
- Obtaining Service and Support 11
- Cisco Connection Online 12
- Ordering Documentation 13
- ISDN Connections 21
- DTE or DCE 22
- Signaling Standards 24
- Router connections 25
- EIA/TIA-449 V.35 X.21 25
- EIA/TIA-232 EIA-530 25
- EIA/TIA-232 Connections 26
- EIA/TIA-449 Connections 26
- V.35 Connections 27
- X.21 Connections 28
- Where to Go Next 31
- Installing the Router 33
- Required Tools and Equipment 34
- Setting Up the Chassis 35
- Rack-Mounting the Chassis 37
- Wall-Mounting the Chassis 39
- TOKEN RING 41
- DC Power Specifications 42
- Wiring the DC Power Supply 43
- Input: –40– –72V 44
- Current: 1.5–1.0A 44
- Watts: 40W 44
- Connecting to a Network 45
- Installing the Router 3-17 49
- AUX SER 0 ETH 51
- Installing the Router 3-21 53
- Configuring the Router 55
- Configuring the Router 4-3 57
- Configuring the Router 4-5 59
- Configuring the Router 4-9 63
- Configuring the Router 4-11 65
- Using Configuration Mode 66
- Using AutoInstall 67
- Cisco IOS Software Basics 68
- Saving Configuration Changes 71
- Configuring ISDN 72
- SPID_no [LDN] 74
- Example ISDN Configuration 75
- Configuring ISDN 76
- Getting More Information 77
- Troubleshooting the Router 79
- Isolating Problems 80
- ° F (0to40°C) 80
- Reading the LEDs 81
- Figure A-3 Model 2503 LEDs 82
- Figure A-4 Model 2504 LEDs 82
- Figure A-5 Model 2513 LEDs 82
- Figure A-6 Model 2514 LEDs 83
- Figure A-7 Model 2515 LEDs 83
- Maintaining the Router 85
- Opening the Chassis 86
- Screw Slot 87
- Flat-blade screwdriver 87
- Maintaining the Router B-5 89
- Maintaining the Router B-7 91
- Upgrading the DRAM SIMM 92
- • ESD-preventive wrist strap 94
- • System-code SIMM(s) 94
- System-Code SIMM Replacement 95
- Closing the Chassis 97
- Cable Specifications 99
- Identifying a Roll-Over Cable 100
- Token Ring Port Pinouts 105
- EIA/TIA-232 108
- EIA/TIA-449 111
- <— indicates DCE to DTE 114
- Multiport Serial Routers 123
- Safety Recommendations 124
- General Site Requirements 125
- Site Environment 126
- Preventive Site Configuration 126
- Configuring Equipment Racks 127
- Power Supply Considerations 127
- Installation Checklist 129
- Creating a Site Log 130
- Cabling Considerations 130
- Distance Limitations 131
- Console Port Connections 133
- Auxiliary Port Connections 133
- Ethernet Connections 134
- Token Ring Connections 134
- BRI Connections 136
- Inspecting the System 137
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