Connecting Fast Ethernet-PRI Network Modules

Table Of Contents

Connecting Fast Ethernet-PRI Network Modules

1-Port Fast Ethernet and 1- or 2-Port Channelized T1/ISDN PRI Network Modules

Connecting Fast Ethernet Channelized T1 Modules

1-Port Fast Ethernet and 1- or 2-Port Channelized T1/ISDN PRI with CSU Network Modules

Connecting Fast Ethernet Channelized T1 with CSU Modules

1-Port Fast Ethernet and 1- or 2-Port Channelized E1/ISDN PRI Balanced or Unbalanced Network Modules

Connecting Fast Ethernet Channelized E1 Modules

Setting Interfaces to Balanced or Unbalanced Termination

Configuring Unbalanced Mode

Configuring Balanced Mode

Fast Ethernet-PRI Module LEDs

Connecting Fast Ethernet-PRI Network Modules

This chapter describes how to connect Fast Ethernet-Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) network modules and contains the following sections:

• 1-Port Fast Ethernet and 1- or 2-Port Channelized T1/ISDN PRI Network Modules

• 1-Port Fast Ethernet and 1- or 2-Port Channelized T1/ISDN PRI with CSU Network Modules

• 1-Port Fast Ethernet and 1- or 2-Port Channelized E1/ISDN PRI Balanced or Unbalanced Network Modules

• Fast Ethernet-PRI Module LEDs

Note Unless specifically identified, references to Fast Ethernet-PRI network modules in this chapter include all these network modules.

Tip To determine whether your router supports a specific network module, see Table 1-6 on page 1-16.

1-Port Fast Ethernet and 1- or 2-Port Channelized T1/ISDN PRI Network Modules

This section provides information about the following network modules:

•1-port Fast Ethernet 1-port channelized T1/ISDN PRI network module (NM-1FE1CT1) (see Figure 4-1)

•1-port Fast Ethernet 2-port channelized T1/ISDN PRI network module (NM-1FE2CT1) (see Figure 4-2)

Figure 4-1 1-Port Fast Ethernet 1-Port Channelized T1 Network Module

Figure 4-2 1-Port Fast Ethernet 2-Port Channelized T1 Network Module

Connecting Fast Ethernet Channelized T1 Modules

Use the following sections for Fast Ethernet and PRI connections.

Fast Ethernet Port

Use a straight-through two-pair Category 5 unshielded twisted-pair (UTP) cable to connect the RJ-45 port on the Fast Ethernet-PRI network module to a switch, hub, repeater, server, or other network device. These ports are color-coded yellow. Figure 4-3 shows the RJ-45 port connected to a hub.

Note RJ-45 cables are not available from Cisco Systems. These cables are widely available and must be Category 5 cables.

Figure 4-3 Connecting a Fast Ethernet RJ-45 Port to a Hub

PRI Ports

This section describes how to connect channelized T1 and channelized E1 ISDN PRI ports to the network. These ports are color-coded tan.

Use a DB-15-to-DB-15 T1 serial cable to connect a CT1/PRI port to a T1 channel service unit (CSU). (See Figure 4-4.)

Figure 4-4 Connecting a CT1/PRI Port to a T1 CSU

1-Port Fast Ethernet and 1- or 2-Port Channelized T1/ISDN PRI with CSU Network Modules

This section provides information about the following network modules:

•1-port Fast Ethernet 1-port channelized T1/ISDN PRI with CSU network module (NM-1FE1CT1-CSU) (see Figure 4-5)

•1-port Fast Ethernet 2-port channelized T1/ISDN PRI with CSU network module (NM-1FE2CT1-CSU) (see Figure 4-6)

Figure 4-5 1-Port Fast Ethernet 1-Port Channelized T1 with CSU Network Module

Figure 4-6 1-Port Fast Ethernet 2-Port Channelized T1 with CSU Network Module

Connecting Fast Ethernet Channelized T1 with CSU Modules

Use the following sections for connections to the Fast Ethernet or CT1/PRI-CSU ports.

Fast Ethernet Port

To connect the Fast Ethernet port, see the "Fast Ethernet Port" section.

CT1/PRI-CSU Port

To connect the CT1/PRI-CSU PRI ports, use a straight-through RJ-48C-to-RJ-48C cable to connect a PRI port to an RJ-48C jack. (See Figure 4-7.) These ports are color-coded tan.

Figure 4-7 Connecting a CT1/PRI-CSU Port to an RJ-48C Jack

1-Port Fast Ethernet and 1- or 2-Port Channelized E1/ISDN PRI Balanced or Unbalanced Network Modules

This section provides information about the following network modules:

•1-port Fast Ethernet 1-port channelized E1/ISDN PRI balanced (120-ohm) network module (NM-1FE1CE1B) (see Figure 4-8)

•1-port Fast Ethernet 1-port channelized E1/ISDN PRI unbalanced (75-ohm) network module (NM-1FE1CE1U) (see Figure 4-8)

•1-port Fast Ethernet 2-port channelized E1/ISDN PRI balanced (120-ohm) network module (NM-1FE2CE1B) (see Figure 4-9)

•1-port Fast Ethernet 2-port channelized E1/ISDN PRI unbalanced (75-ohm) network module (NM-1FE2CE1U) (see Figure 4-9)

Figure 4-8 1-Port Fast Ethernet 1-Port Channelized E1 Network Module

Figure 4-9 1-Port Fast Ethernet 2-Port Channelized E1 Network Module

Connecting Fast Ethernet Channelized E1 Modules

Use the following sections to connect to the Fast Ethernet or CE1-PRI-B ports.

Fast Ethernet Port

To connect the Fast Ethernet port, see the "Fast Ethernet Port" section.

CE1/PRI-B Port

Use the appropriate cable to connect a CE1/PRI-B (120-ohm) port to an E1 CSU. (See Figure 4-10, Figure 4-11, and Figure 4-12, showing DB-15, twinax, and RJ-45 CSUs respectively.) These ports are color-coded tan.

Figure 4-10 Connecting a CE1/PRI-B Port to an E1 CSU (DB-15-to-DB-15 Connectors)

Figure 4-11 Connecting a CE1/PRI-B Port to an E1 CSU (DB-15-to-Twinax Connectors)

Figure 4-12 Connecting a CE1/PRI-B Port to an E1 CSU (DB-15-to-RJ-45 Connectors)

CE1/PRI-U Port

Use the appropriate cable to connect a CE1/PRI-U (75-ohm) port to an E1 CSU. Figure 4-13 shows a CSU with BNC connectors. These ports are color-coded tan.

Figure 4-13 Connecting a CE1/PRI-U Module to an E1 CSU (DB-15-to-BNC Connectors)

Setting Interfaces to Balanced or Unbalanced Termination

This section describes how to configure an E1 network module for balanced or unbalanced termination. The module consists of two circuit boards, or cards. A terminal block and a set of five jumpers are provided on each card to configure termination. Figure 4-14 shows these terminal blocks.

Caution To avoid damaging electrostatic discharge (ESD)-sensitive components, observe all ESD precautions when handling the circuit boards.

Figure 4-14 Terminal Block Locations

Note The position of the jumpers is different on the two terminal blocks. See Figure 4-14 and the silk screening on the network module to ensure the correct jumper position.

Figure 4-15 shows a typical jumper.

Figure 4-15 Jumper

Configuring Unbalanced Mode

To configure the network module for unbalanced mode, follow these steps:

Step 1 Turn off electrical power to the router. However, to channel ESD voltages to ground, do not unplug the power cable. Remove all network interface cables, including telephone cables, from the rear panel.

The following warning applies to routers that use a DC power supply:

Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. Statement 7

Step 2 Loosen the module captive mounting screws, using a Phillips or flat-blade screwdriver.

Step 3 Hold the captive screws between two fingers, and pull the network module toward you until it slides free of the chassis.

Step 4 Set the network module on an ESD-preventive mat.

Step 5 Using needlenose pliers, set jumpers J5 through J9 on the top terminal block to the 75-ohm position. Set jumpers J4 through J8 on the bottom terminal block to the same 75-ohm position. (See Figure 4-16.)

Figure 4-16 Jumper Insertion

Figure 4-17 shows the top terminal block set to unbalanced (75-ohm) position.

Figure 4-17 Jumpers in Unbalanced 75-Ohm Position (Top Card)

Step 6 Align the network module with the guides in the chassis and slide it gently into the slot.

Step 7 Push the module into place until you feel its edge connector mate securely with the connector on the motherboard.

Step 8 Fasten the module captive mounting screws into the holes in the chassis, using the Phillips or flat-blade screwdriver.

Step 9 If the router was previously running, reinstall the network interface cables and turn on power to the router.

The following warning applies to routers that use a DC power supply:

Warning After wiring the DC power supply, remove the tape from the circuit breaker switch handle and reinstate power by moving the handle of the circuit breaker to the ON position. Statement 8

Configuring Balanced Mode

To configure the network module for balanced mode, follow these steps:

Step 1 Turn off electrical power to the router. However, to channel ESD voltages to ground, do not unplug the power cable. Remove all network interface cables, including telephone cables, from the rear panel.

The following warning applies to routers that use a DC power supply:

Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. Statement 7

Step 2 Loosen the module captive mounting screws, using a Phillips or flat-blade screwdriver.

Step 3 Hold the captive screws between two fingers, and pull the network module toward you until it slides free of the chassis.

Step 4 Set the network module on an ESD-preventive mat.

Step 5 Using needlenose pliers, set jumpers J5 through J9 on the top terminal block to the 120-ohm position. Set jumpers J4 through J8 on the bottom terminal block to the same 120-ohm position. (See Figure 4-16.)

Step 6 Align the network module with the guides in the chassis and slide it gently into the slot.

Step 7 Push the module into place until you feel its edge connector mate securely with the connector on the motherboard.

Step 8 Fasten the module captive mounting screws into the holes in the chassis, using the Phillips or flat-blade screwdriver.

Step 9 If the router was previously running, reinstall the network interface cables and turn on power to the router.

The following warning applies to routers that use a DC power supply:

Warning After wiring the DC power supply, remove the tape from the circuit breaker switch handle and reinstate power by moving the handle of the circuit breaker to the ON position. Statement 8

Fast Ethernet-PRI Module LEDs

All network modules have an enable (EN) LED. This LED indicates that the module has passed its self-tests and is available to the router.

All Fast Ethernet-PRI modules have four LEDS for the Fast Ethernet port, and four additional LEDs for each PRI port. Figure 4-18 shows LEDs for the 1-port Fast Ethernet 2-port channelized E1/ISDN PRI balanced (120-ohm) network module as an example.

Figure 4-18 Fast Ethernet and ISDN PRI LEDs

Table 4-1 describes Fast Ethernet LEDs. Table 4-2 describes ISDN PRI LEDs.

Table 4-1 Fast Ethernet LEDs

LED

Color

Meaning

COLL

Yellow

Collision activity is occurring on the network.

LINK

Green

A link has been established with the station at the other end of the cable.

100MBPS

Green

Speed of the interface is 100 Mbps.

FDX

Green

Interface is in full-duplex mode.

Table 4-2 ISDN PRI LEDs

LED

Color

Meaning

REMOTE ALARM

Yellow

A remote source is indicating an error at its end of the connection.

LOCAL ALARM

Yellow

Incoming signal shows loss of signal, loss of frame, or excessive errors.

LOOPBACK

Yellow

Line or local loopback state is set or detected.

CARRIER DETECT

Green

DS-1 carrier to the network is detected.

LED	Color	Meaning
COLL	Yellow	Collision activity is occurring on the network.
LINK	Green	A link has been established with the station at the other end of the cable.
100MBPS	Green	Speed of the interface is 100 Mbps.
FDX	Green	Interface is in full-duplex mode.

LED	Color	Meaning
REMOTE ALARM	Yellow	A remote source is indicating an error at its end of the connection.
LOCAL ALARM	Yellow	Incoming signal shows loss of signal, loss of frame, or excessive errors.
LOOPBACK	Yellow	Line or local loopback state is set or detected.
CARRIER DETECT	Green	DS-1 carrier to the network is detected.