Cabling Specifications
This appendix describes cables and cabling guidelines for the Cisco 815 integrated services router and contains the following sections:
•Ethernet Network Cabling Guidelines

Note For information about cables used with Cisco WAN interface cards (WICs), refer to the Cisco Interface Cards Hardware Installation Guide.
Ethernet Cables
This section describes the Ethernet cables that are used to connect the router to your local Ethernet network. A 10/100BASE-TX router, such as the Cisco 815 integrated services router, requires Category 5 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable. Table B-1 gives the pinouts for an Ethernet cable.
Pin 1 |
|
|
Pin |
---|---|---|---|
1 |
TX+ |
—> |
1 |
2 |
TX- |
—> |
2 |
3 |
RX+ |
<— |
3 |
6 |
RX- |
<— |
6 |
1 Pins 4, 5, 7, and 8 are not used for signaling. |
Ethernet Network Cabling Guidelines
Table B-2 describes some guidelines for creating Ethernet networks. Figures might vary, depending on the manufacturer of the network equipment.
|
|
|
---|---|---|
Maximum segment length |
100 meters |
100 meters |
Maximum number of segments per network |
5 |
• • |
Maximum hop count1 |
4 |
• • |
Maximum number of nodes per segment |
1024 |
1024 |
Cable type required |
UTP Category 3, 4, or 5 |
UTP Category 5 or STP |
1 Hop count = Routing metric used to measure the distance between a source and a destination. |
Console Cable and Adapter
A console cable is provided with your router. Use this cable to connect the router to a PC or terminal. The router comes with a DB-9-to-DB-25 adapter that may be used for connecting the router to a modem, using the console cable.
Table B-3 describes the wiring for the console port and the console cable. This table also includes pinouts for the DB-9-to-DB-25 adapter.