Cisco uBR7100 Series Hardware Installation Guide - Appendix C - Cable Specifications [Cisco uBR7100 Series Universal Broadband Routers]

Table Of Contents

Cable Specifications

Coaxial Cables

Console and Auxiliary Port Cables and Pinouts

Identifying an RJ-45 Rollover Cable

Console Port Cables and Pinouts

Auxiliary Port Cables and Pinouts

Fast Ethernet Port Cables and Pinouts

Identifying an RJ-45 Crossover Cable

Identifying an RJ-45 Straight-Through Cable

Fiber-Optic Cables and Connectors

Laser Classification Labels

Cable Specifications

This appendix contains cable and cable pinout information for the Cisco uBR7100 series universal broadband routers.

•Coaxial Cables

•Console and Auxiliary Port Cables and Pinouts

•Fast Ethernet Port Cables and Pinouts

Note This appendix specifies pinouts only for the pins used. Pins not listed in the tables are not connected.

Coaxial Cables

The coaxial cable used to connect the Cisco uBR7100 series universal broadband routers at the headend should be very high-quality cable.

We recommend that you use a headend-grade coaxial cable or a quad-shield coaxial cable to connect the cable modem cards to the hybrid fiber-coaxial (HFC) network. The center conductor must be straight and extend 1/8 inch (3.2 mm) beyond the end of the connector, and the connector should be securely crimped to the cable. The following headend cables are recommended:

•59-series cable (preferred)—20 AWG (0.032 inch/0.81 mm diameter) silver plated, copper-clad, steel center conductor; bonded foil inner shield; 95 percent braid second shield; nonbonded foil third shield; 95 percent braid fourth shield.

•59-series quad shield—20 AWG (0.032 inch/0.81 mm diameter) copper-clad steel center conductor; bonded foil inner shield; 53 percent braid second shield; nonbonded foil third shield; 34-35 percent braid fourth shield.

•6-series quad shield—18 AWG (0.0359 inch/0.91 mm diameter) copper-clad steel center conductor; bonded foil inner shield; 60 percent braid second shield; nonbonded foil third shield; 40-42 percent braid fourth shield.

Note Any of the three of the coaxial cables listed can be used to connect a Cisco cable interface card to the HFC network; however, the consistent use of 59-series cable is preferred. If you connect a 59-series cable to a cable interface card that was previously connected using 6-series cable, the difference in the center connector diameter might cause intermittent connectivity loss.

If you use different types of coaxial cable, the following problems can appear:

•Damage to Cisco uBR7100 series cable interface card connectors—Cable interface card connectors are designed for 59-series or 6-series cable and connectors. Larger cables can damage the connectors.

•Poor return loss—High-quality cable and correct connectors help to ensure an optimal return loss of 16 dB or more.

Caution Poorly shielded coaxial cable may result in undesired signal leakage (egress), interference from over-the-air signals (ingress), or crosstalk between cables in close physical proximity.

Console and Auxiliary Port Cables and Pinouts

The router arrives with a console and auxiliary cable kit, which contains the cable and adapters you need to connect a console (an ASCII terminal or PC running terminal emulation software) or modem to the router. The console and auxiliary cable kit includes:

•RJ-45-to-RJ-45 rollover cable

•RJ-45-to-DB-9 female data terminal equipment (DTE) adapter labeled TERMINAL

•RJ-45-to-DB-25 male data communications equipment (DCE) adapter labeled MODEM

Figure C-1 shows the RJ-45 cable connector.

Figure C-1 RJ-45 Plug and Receptacle

Identifying an RJ-45 Rollover Cable

You can identify a rollover cable by holding the two ends of the cable next to each other, with the tab at the back. The wire connected to the pin on the outside of the lefthand plug should be the same color as as the wire connected to the pin on the outside of the righthand plug, as shown in Figure C-2.

Figure C-2 RJ-45 Rollover Cable Identification

The colored wires at one connector are in the reverse order at the other connector (reverses pins 1 and 8, 2 and 7, 3 and 6, 4 and 5, 5 and 4, 6 and 3, 7 and 2, 8 and 1).

The wires of the straight-through cable are in the same sequence at both ends of the cable.

Note If your cable was purchased from Cisco Systems, pin 8 is white.

Console Port Cables and Pinouts

Use the RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL) to connect the console port to a PC running terminal emulation software. Table C-1 lists the signals and pinouts for the asynchronous serial console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-9 female DTE adapter.

Table C-1 Console Port Signaling and Cabling Using a DB-9 Adapter

Console Port (DTE)

RJ-45-to-RJ-45 Rollover Cable

RJ-45-to-DB-9 Terminal Adapter

Console Device

Signal

RJ-45 Pin

RJ-45 Pin

DB-9 Pin

Signal

RTS

1¹

8

8

CTS

DTR

2

7

6

DSR

TxD

3

6

2

RxD

GND

4

5

5

GND

GND

5

4

5

GND

RxD

6

3

3

TxD

DSR

7

2

4

DTR

CTS

81

1

7

RTS

¹Pin 1 is connected internally to pin 8.

Auxiliary Port Cables and Pinouts

Use the RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-25 male DCE adapter (labeled MODEM) to connect the auxiliary port to a modem. Table C-2 lists the signals and pinouts for the asynchronous serial auxiliary port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 male DCE adapter (labeled MODEM).

Table C-2 Auxiliary Port Signaling and Cabling Using a DB-25 Adapter

AUX Port (DTE)

RJ-45-to-RJ-45 Rollover Cable

RJ-45-to-DB-25 Modem Adapter

Modem (DCE)

Signal

RJ-45 Pin

RJ-45 Pin

DB-25 Pin

Signal

RTS

1

8

4

RTS

DTR

2

7

20

DTR

TxD

3

6

3

TxD

GND

4

5

7

GND

GND

5

4

7

GND

RxD

6

3

2

RxD

DSR

7

2

8

DCD

CTS

8

1

5

CTS

Fast Ethernet Port Cables and Pinouts

The 10BASE-T/100BASE-TX Fast Ethernet ports support IEEE 802.3 and IEEE 802.3u specifications for 10-Mbps and 100-Mbps transmission over unshielded twisted-pair (UTP) cables. Each Fast Ethernet port on the router has an RJ-45 connector to attach to Category 3 or Category 5 UTP cables.

•Use a Category 3 UTP crossover cable when connecting 10BASE-T port to a hub.

•Use a Category 3 UTP straight-through cable when connecting to a PC or other Ethernet device.

•Use a Category 5 UTP crossover cable when connecting 100BASE-TX to a hub.

•Use a Category 5 UTP straight-through cable when connecting to a PC or other Ethernet device.

Note Cisco Systems does not supply Category 3 or Category 5 UTP RJ-45 cables; these cables are available commercially.

Identifying an RJ-45 Crossover Cable

You can identify a crossover cable by comparing the two modular ends of the cable. Hold the cables side-by-side with the tab at the back. The first (far left) colored wire (pin 1) at one end of the cable is the third colored wire (pin 3) at the other end of the cable. The second colored wire (pin 2) at one end of the cable is the sixth colored wire (pin 6) at the other end of the cable. Pin 1 wire is white.

Figure C-3 RJ-45 Crossover Cable Identification

Identifying an RJ-45 Straight-Through Cable

You can identify a straight-through cable by comparing the two modular ends of the cable. Hold the cables side-by-side with the tab at the back. The straight-through cable's wires are in the same sequence at both ends of the cable.

Figure C-4 RJ-45 Straight-Through Cable Identification

Note If your cable was purchased from Cisco Systems, pin 1 is white.

Table C-3 lists the pinouts for the two Fast Ethernet ports.

Table C-3 10BASE-T RJ-45 Connector Pinouts

RJ-45 Pin

Description

RJ-45 Pin

Description

1

Tx+

3

Rx+

2

Tx-

6

Rx-

Fiber-Optic Cables and Connectors

Warning Invisible laser radiation may be emitted from the end of the unterminated fiber cable or connector. Do not view directly with optical instruments. Viewing the laser output with certain optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of 100 mm may pose an eye hazard. Statement 1056

Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051

Use a single-mode or multimode fiber-optic interface cable to connect your Cisco uBR7100 series router to another router or switch. In general, multimode cables are gray or orange, and single-mode cables are yellow. For SONET or synchronous digital hierarchy (SDH) single-mode and multimode fiber-optic connections, use one duplex SC-type connector (Figure C-5) or two simplex SC-type connectors. (See Figure C-5.)

Figure C-5 Duplex SC Cable Connector Attaching Simplex or Duplex Fiber-Optic Cables

Figure C-6 Simplex SC Cable Connector

Figure C-7 Attaching Simplex or Duplex Fiber-Optic Cables

Attach either one duplex fiber cable or two simplex fiber cables between the digital pulse terminator (DPT) port adapter and the device to which the DPT port adapter is connected. Observe the receive (RX) and transmit (TX) cable relationship shown in Figure C-7.

Laser Classification Labels

The following labels are found on port adapters that use fiber-optic connections.

Figure C-8 Laser Caution Label

Warning Class 1 laser product. Statement 1008

Figure C-9 LED Caution Label

Warning Class 1 LED product Statement 1027