ATM Port Adapter and Interface Module Installation Guide
Installing ATM Port Adapters and Interface Modules

Table of Contents

Installing ATM Port Adapters and Interface Modules
Preparing Network Connections
Removing and Installing Carrier Modules, Port Adapters, and Interface Modules

Installing ATM Port Adapters and Interface Modules


This chapter describes the procedures for preparing network connections and installing and replacing port adapters, interface modules, and carrier modules in an ATM chassis. This chapter includes the following sections:


Warning Before you install, operate, or service the system, read the Site Preparation and Safety Guide. This guide contains important safety information you should know before working with the system.


Note   Instructions for unpacking the system and additional equipment are provided in the Unpacking Instructions publication, which is attached to the outside of your shipping container.

Preparing Network Connections

When preparing your site for network connections to the switch, consider the following factors related to each type of interface:

  • Cabling required for each interface (fiber-optic, coaxial, or twisted-pair cabling)
  • Distance limitations for each signal type
  • Additional interface equipment needed, such as transceivers, modems, channel service units (CSUs), or data service units (DSUs)
  • Connections not provided by service providers, such as a network termination unit (NTU) for T1, E1, DS3, and E3 port adapters

  • Note   Before installing the switch, have all additional external equipment and cables available. If you intend to build your own cables, refer to the cable pinouts in "Connector Pinouts." For ordering information, contact a customer service representative.

Distance Limitations

The length of your networks and the distances between connections depend on the type of signal, the signal speed, and the transmission media (the type of cabling used to transmit the signals). For example, fiber-optic cable has a greater channel capacity than twisted-pair cabling.


Note   The distances and rate limits in this chapter are the IEEE-recommended maximum speeds and distances for signaling. However, you can get good results at speeds and distances far greater than these if you understand the electrical problems that might arise and can compensate for them. Do so at your own risk.

The following distance limits are provided as guidelines for planning your network connections before installation.

The maximum distances for ATM network segments and connections depend on the type of transmission cable used; for example, unshielded twisted-pair (UTP), foil twisted-pair (FTP), single-mode, or multimode fiber-optic cable.

Networking standards set recommended maximum distances between stations using fiber-optic and UTP cable. Table 2-1 lists the recommended maximum cable lengths.

Table 2-1   ATM Maximum Transmission Distances

Transceiver Speed Cable Type Maximum Distance
Between Stations

25 Mbps

Category 5 UTP

328 feet (100 meters)

OC-3c, 155 Mbps

Category 5 UTP

328 feet (100 meters)

OC-3c, 155 Mbps

Single-mode fiber

9 miles (15 km)

OC-3c, 155 Mbps

Single-mode fiber, extended reach +

18 miles (30 km)

OC-3c, 155 Mbps

Single-mode fiber, long reach

25 miles (40 km)

OC-3c, 155 Mbps

Multimode fiber

1.2 miles (2 km)

OC-12c, 622 Mbps

Single-mode fiber

9 miles (15 km)

OC-12c, 622 Mbps

Single-mode fiber, long reach

25 miles (40 km)1

OC-12c, 622 Mbps

Multimode fiber

1640 feet (500 meters)

OC-48c, 2488 Mbps

Single-mode fiber, intermediate reach

9 miles (15 km)1

OC-48c, 2488 Mbps

Single-mode fiber, long reach

50 miles (80 km)1

T1, 1.544 Mbps

Category 5 twisted-pair

650 feet (198 meters)

E1, 2.048 Mbps

Category 5 twisted-pair and FTP (120 ohms)

650 feet (198 meters)

E1, 2.048 Mbps

Coaxial cable (75 ohms)

650 feet (198 meters)

CE1, 2.048 Mbps

Category 5 twisted-pair

650 feet (198 meters)

CES T1

Category 5 twisted-pair and FTP

650 feet (198 meters)

CES E1

Category 5 twisted-pair and FTP (120 ohms)

650 feet (198 meters)

CES E1

Coaxial cable (75 ohms)

650 feet (198 meters)

DS3, 45 Mbps

Coaxial cable

450 feet (137 meters)

E3, 34 Mbps

Coaxial cable

1299 feet (396 meters)

CDS3, 45 Mbps

Coaxial cable

450 feet (137 meters)

1If attaching a short cable to this port adapter or interface module, you must add 10 dB of attenuation to the cable or the transmitter might overdrive the receiver and introduce data errors.

ATM Connection Equipment Requirements

All ATM interfaces are full duplex.You must use the appropriate ATM interface cable to connect the ATM multimode, single-mode, or UTP port adapter with an external ATM network.

Fiber-Optic Traffic

For multimode or single-mode fiber-optic traffic, use the following:

  • Use the SC-type connector shown in Figure 2-1 to connect the 155-Mbps port adapter, the 622-Mbps port adapter, the OC-12c, and the OC-48c interface module with the external connection.
  • Use the MT-RJ connector shown in Figure 2-2 to connect the OC-3c interface module with the external connection.

Figure 2-1   Fiber-Optic Network Interface SC-Type Connector

Figure 2-2   Fiber-Optic Network Interface MT-RJ Connector

UTP Traffic

For UTP traffic, use the RJ-45 connector to connect the port adapter with the external ATM switch. (See Figure 2-3.)


Figure 2-3   RJ-45 and RJ-48c Interface Cable Connectors

Note   The terms RJ-45 connector and RJ-48c connector are sometimes used interchangeably. The RJ-48c is the jack or receptacle; the RJ-45 is the plug.

Table B-1 lists the signals for the 155-Mbps UTP port adapter using an RJ-45 connector.


Warning To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord.

T1 and E1 Port Adapters and Traffic

For T1 and E1 or CES T1 and E1 port adapters, use the RJ-48c connector to connect the port adapters with the external network. (See Figure 2-3.)

For T1 and E1 or CES T1 and E1 traffic, use the RJ-48c connector to connect the port adapter with the external T1 channel service unit (CSU).


Note   For T1, E1, and CES T1 and E1 port adapters, RJ48c cabling outside of the United States and Canada requires foil twisted-pair cabling to meet EMI requirements. Cabling impedance for T1 and CES T1 is 100 ohms. Cabling impedance for E1 and CES E1 is 120 ohms.

Table B-2 lists the signals for the RJ-48c T1, E1, and CES T1 and
E1 connectors.

E1, CES E1, DS3, E3, and CDS3 Connections

For E1, CES E1, DS3, E3, and CDS3 connections, use the 75-ohm and 120-ohm (120 ohms in the RJ cables) RG-59 coaxial cable, which has bayonet-style, twist-lock (BNC) connectors to connect the port adapters with external ATM switches. (See Figure 2-4.)


Figure 2-4   Coaxial Interface Cable and BNC Connectors

You can use a 75-120-ohm adapter cable to obtain 75-ohm E1 BNC connections on 120-ohm E1 port adapters. The adapter has an eight-pin RJ-48c connector on the 120-ohm side and dual BNC coax connectors (transmit and receive) on the 75-ohm side. (See Figure 2-5.) The 120-ohm E1 ports of your port adapter connect to the 75-120-ohm adapter cable using RJ-48c connectors and Category 3 or 5 foil twisted-pair (FTP) cable with 120-ohm impedance. (See Figure 2-6.)


Figure 2-5   75-120-ohm Adapter Cable

Figure 2-6   E1 Port Adapter Interface Cable and RJ-48c Connector

Note   Table B-2 on lists the pinouts for the RJ-48c connectors.

To connect the 75-120-ohm adapter cable between the port adapter and the 75-ohm unbalanced G.703 line (see Figure 2-7), use the following procedure:


Step 1   Attach the Category 3 or 5 FTP cable directly to the RJ-48c port on the 120-ohm E1 port adapter.


Note    To comply with CE marking requirements, use foil twisted-pair (FTP) cable with 120-ohm impedance.

Step 2   Attach the network end of your Category 3 or Category 5 cable to your 75-120-ohm adapter cable.

Step 3   Attach the BNC connector of the 75-120-ohm adapter cable marked receive to the network device connector marked transmit.

Step 4   Attach the BNC connector of the 75-120-ohm adapter cable marked transmit to the network device connector marked receive.


Figure 2-7   Connecting a 75-120-ohm Adapter Cable to a 120-ohm E1 Port Adapter




Special Considerations

This section discusses how to limit the EMI susceptibility of the E1, CES E1, and E3 BNC connections, and how to connect the 25-Mbps multiple connection cable from the port adapter to the wiring closet.

E1, CES E1, and E3 Receive Port Capacitor Clips

Networking equipment is subject to problems due to the following electromagnetic interference factors: loss of grounding integrity; EMI radiation from the port adapter or other installed boards; and a circuit's susceptibility to radiated EMI from other sources.

A capacitor clip is available for use with BNC connectors to reduce the emissions radiated from the receive (RX) port. (See Figure 2-8.)

The capacitor clip has two spring-loaded clamps so that you can secure the device over the mated BNC connectors on each RX port of a BNC connector. Detail B of Figure 2-8 shows you how to install these clips.


Figure 2-8   E1 Jumpers and Capacitor Clips for a CES E1 Port Adapter with BNC Connectors

Caution   Compliance with European certification standards is contingent upon the use of these capacitor clips on port adapters with BNC connectors.


Note   These capacitor clips do not ship with port adapters. You can order them separately using Cisco part number CLIP-EMI-BNC-ATM.

25-Mbps Port Adapter Connections

For 25-Mbps port adapter connections, use the special 96-pin Molex to either the 4 RJ-45 multileg cable or the 12 RJ-45 multileg cable to connect the switch to the wiring closet patch panel. (See Figure 2-9.)


Figure 2-9   25-Mbps Multiple Connection Cable

Caution   To avoid receiving erroneous failure messages, allow at least 15 seconds for the system to reinitialize. Note the current configuration of all interfaces before you remove or insert another port adapter.

Removing and Installing Carrier Modules, Port Adapters, and Interface Modules

This section describes how to remove and install carrier modules, port adapters, and interface modules.

Hot Swapping

Carrier modules, port adapters, and interface modules support hot swapping. You can install, remove, replace, and rearrange the modules without turning off the system power. When the system detects that a carrier module, port adapter, or interface module is installed or removed, it automatically runs diagnostic and discovery routines, acknowledges the presence or absence of the module, and resumes system operation without any operator intervention.


Caution   Always tighten the captive installation screws on the processor card, port adapters, and interface modules when you are installing them. These screws prevent accidental removal of the modules and provide proper grounding for the system. Tightening the captive installation screws also helps ensure that the bus connectors are properly seated in the backplane.


Caution   Turn off the system before removing the processor card if there is not a redundant processor card installed. Removing the processor card from the system while it operates shuts down ATM switching. However, the processor card is hot-swappable in all chassis; that is, no hardware damage occurs if it is removed while the power is on.

Guidelines for Removing and Installing Carrier Modules, Port Adapters, and Interface Modules

The release levers and captive installation screws align and seat the card connectors in the backplane. (See Figure 2-10.) Follow these guidelines and the installation and removal instructions carefully, and avoid the following incorrect insertion practices:


Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.

  • Use the release levers and captive installation screws to remove and install carrier modules, port adapters, and interface modules. Do not use the faceplate to force or slam a carrier module, port adapter, or interface module into a slot; this action can damage the pins on the module connectors.
  • Use the release levers and captive installation screws to ensure that the module connector mates correctly with the backplane. Do not use the faceplate (rather than the release levers or captive installation screws) to seat the processor card, carrier module, port adapter, or interface module in the backplane; this action can seat the module improperly.
  • Use the release levers and captive installation screws to ensure that all three layers of pins mate with the backplane. Do not use the faceplate to insert a processor card, carrier module, port adapter, or interface module, and do not fail to push the release levers to the full 90-degree position. If some but not all of the connector pins are mated to the backplane, check for system suspension.
  • Insert the carrier module, port adapter, or interface module smoothly, ensuring it is fully in place. Do not insert the components too slowly or leave them partially inserted. This action could cause the switch software to time-out and fail to recognize the installed component. If that happens, disconnect and reinsert the carrier module, port adapter, or interface
    module again.

Figure 2-10   Release Levers and Captive Installation Screws

Note   A port adapter is a hot-swappable device. You can remove or install port adapters while the carrier module is installed in a running chassis, or when the carrier module is removed from the chassis. The ATM switch recognizes the port adapter and its interfaces automatically.

Using Release Levers and Captive Installation Screws

To ensure that the card connector pins disconnect from the backplane in the logical sequence expected by the system, be sure to use the release levers and captive installation screws when removing a processor card, carrier module, port adapter, or interface module. Any module that is only partially connected to the backplane can hang the bus. Detailed steps for correctly performing hot swapping are included in the following procedures for removing and installing carrier modules, port adapters, and interface modules.

Figure 2-10 shows the release levers and captive installation screws, which you must use when inserting or removing the carrier modules and interface modules.

Tools Required

You need the following tools for installation and removal:

  • A 3/16-inch flat-blade screwdriver
  • An ESD wrist strap or other grounding device

Removing a Carrier Module

To remove a carrier module, follow these steps:


Step 1   Disconnect all cables from the port adapter that is going to be removed.


Caution   Failure to disconnect cables could damage the port adapters.

Step 2   Loosen the captive installation screws at the left and right sides of the carrier module with a screwdriver. (See Figure 2-11A.)

Step 3   Place your thumbs on the left and right release levers and simultaneously push the left lever left and the right lever right to release the carrier module from the backplane connector. (See Figure 2-11B.)

Step 4   Grasp the carrier module faceplate with one hand and place your other hand under the carrier to support and guide the module out of the slot. Avoid touching the card. (See Figure 2-11C.)

Step 5   Pull the carrier module straight out of the slot carefully, keeping your other hand under the carrier to guide it. Keep the module at a 90-degree orientation to the backplane. (See Figure 2-11C.)

Step 6   Place the removed carrier module on an antistatic mat or antistatic foam, or immediately install it in another slot.

Step 7   Install a module filler plate (product number WATM-CAM-2P=) to keep dust out of the chassis and to maintain proper airflow through the module compartment if the carrier module slot is to remain empty.


Figure 2-11   Removing a Carrier Module




Removing a Port Adapter

To remove a port adapter from a carrier module, follow these steps:


Step 1   Disconnect all cables from the port adapter.


Caution   Failure to disconnect cables could damage the port adapters.

Step 2   Loosen the captive installation screw in the center of the port adapter. As you loosen the captive installation screw in the port adapter, it disengages from the carrier module interface at the rear of the module. (See Figure 2-12A.)

Step 3   Pull the port adapter straight out of the carrier module slot carefully, keeping your other hand under the carrier to guide it. Keep the module at a 90-degree orientation to the backplane. (See Figure 2-12B.)

Step 4   Place the port adapter on an antistatic mat or antistatic foam, or immediately install it in another carrier module.


Figure 2-12   Removing a Port Adapter




Removing an Interface Module

To remove an interface module, follow these steps:


Step 1   Disconnect all cables from the interface module.


Caution   Failure to disconnect cables could damage the port adapters.

Step 2   Loosen the captive installation screws at the left and right sides of the carrier module with a screwdriver. (See Figure 2-13A.)

Step 3   Place your thumbs on the left and right release levers and simultaneously pull the left lever left and the right lever right to release the interface module from the backplane connector. (See Figure 2-13B.)

Step 4   Grasp the interface module faceplate with one hand and place your other hand under the module to support and guide it out of the slot. Avoid touching the module components. (See Figure 2-13C.)

Step 5   Pull the interface module straight out of the slot carefully, keeping your other hand under the module to guide it. Keep the module at a 90-degree orientation to the backplane. (See Figure 2-13C.)

Step 6   Place the removed interface module on an antistatic mat or antistatic foam, or immediately install it in another slot.

Step 7   Install a module filler plate (product number WATM-CAM-2P=) to keep dust out of the chassis and to maintain proper airflow through the module compartment if the interface module slot is to remain empty.


Figure 2-13   Removing an Interface Module




Installing a Carrier Module

You can install carrier modules in slots reserved for port adapters or interface modules in each system. See Table 1-2 for slot assignments for port adapters and interface modules in each system. Figure 2-14 shows a Catalyst 8540 MSR chassis where the 13 slots are numbered 0-12 from top to bottom when viewing the chassis from the front. Slots 0-3 and slots 9-12 are reserved for the carrier modules, port adapters, and interface modules. Figure 2-15 shows a LightStream 1010 chassis where the slots are numbered 0-4 from top to bottom when viewing the chassis from the front. The middle slot (number 2) contains the processor card, which is a required system component. You can install carrier modules and port adapters in slots 0, 1, 3, and 4. Install carrier module and port adapter filler plates in empty carrier module or port adapter slots to maintain consistent airflow through the module compartment.


Note   Carrier modules used in the Catalyst 8510 MSR, Catalyst 5500, and LightStream 1010 are interchangeable. Carrier modules used in the Catalyst 8540 MSR are not interchangeable with the other systems. All systems follow the same procedure for removing and installing carrier modules.


Figure 2-14   Carrier Module Slot Numbers (Catalyst 8540 MSR shown)

Figure 2-15   Carrier Module Slot Numbers (LightStream 1010 shown)

To install a carrier module, follow these steps:


Step 1   Ensure that there is enough clearance to accommodate any interface equipment that you connect directly to the carrier module ports. If possible, install carrier modules between empty slots that contain only module filler plates.

Step 2   Secure the carrier module with the two captive installation screws. Use a 3/16-inch flat-blade screwdriver to loosen the captive installation screws and remove the carrier module filler plate (or the existing carrier module) from the slot you want to use.

Step 3   Hold the carrier module faceplate with one hand, and place your other hand under the carrier and guide it into the slot. Avoid touching the card. (See
Figure 2-16A.)

Step 4   Place the back of the carrier module in the slot and align the notch on each side of the carrier module with the groove in the slot. (See Figure 2-16B.)

Step 5   Keep the carrier module at a 90-degree orientation to the backplane and carefully slide it into the slot until the faceplate makes contact with the release levers.

Step 6   Use the thumb and forefinger of each hand to simultaneously push the left lever and the right lever in until the carrier module is fully seated in the backplane connector. (See Figure 2-16C.)


Caution   Always use the release levers when installing or removing the carrier module. Leaving a module only partially seated in the backplane causes the system to halt and subsequently crash.

Step 7   Use a screwdriver to tighten the captive installation screws on the left and right ends of the carrier module. (See Figure 2-16D.)

Step 8   Attach network interface cables or other devices to the interface ports.


Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.

Step 9   Turn the power on. Refer to the Hardware Installation Guide or the Catalyst 5000 Family Installation Guide.

Step 10   Check the status of the interfaces. If this installation is a replacement port adapter, use the show configuration or show interface atm [slot_num/mod_num/port_num] command to verify that the system has acknowledged the new interfaces and has brought them up.

Refer to your software publications for complete software configuration and command syntax information.


Figure 2-16   Installing a Carrier Module




Installing a Port Adapter

All port adapters support hot swapping, so they can be removed or installed while the system is operating. To install a port adapter in a carrier module, follow these steps:


Step 1   Choose a port adapter slot in a carrier module and ensure that there is enough clearance to accommodate any interface equipment that you connect directly to the port adapter. (See Figure 2-17.) If possible, place port adapters between empty slots that contain only port adapter filler plates.

Step 2   Place the back of the port adapter in the slot and align the notch on the sides of the module carrier with the groove in the slot. (See Figure 2-18.)

Step 3   Hold the port adapter by both sides and guide it into the slot. Avoid touching the port adapter components.


Figure 2-17   Port Adapter Slot Numbers

Figure 2-18   Installing a Port Adapter in a Carrier Module

Step 4   Keep the port adapter at a 90-degree orientation to the backplane and carefully slide the port adapter into the slot until the faceplate makes contact with the carrier module faceplate.

Step 5   Use a 3/16-inch flat-blade screwdriver to tighten the captive installation screw in the center of the port adapter faceplate. Draw the port adapter into the carrier module connector until the port adapter faceplate is flush with the carrier module faceplate and the carrier module is fully seated in the connector.

Step 6   Attach network interface cables or other devices to the interface ports.

Step 7   Use caution when connecting cables. To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors.


Caution   Always use the captive screws when installing or removing port adapters. Leaving a module only partially seated in the carrier module connector causes the system to halt and subsequently crash.

Step 8   Check the status of the interfaces. If this installation is a replacement interface module, use the show configuration or show interface atm [slot_num/mod_num/port_num] command to verify that the system has acknowledged the new interfaces and has brought them up.





Refer to your software publications for complete software configuration and command syntax information.

Installing an Interface Module

You can install interface modules in slots reserved for port adapters or interface modules in the Catalyst 8540 MSR. See Table 1-2 for slot assignments for port adapters and interface modules in each system. Install interface module filler plates in empty slots to maintain consistent airflow through the module compartment.

To install an interface module, follow these steps:


Step 1   Ensure that there is enough clearance to accommodate any interface equipment that you connect directly to the interface module ports. If possible, install interface modules between empty slots that contain only module filler plates.

Step 2   Secure the interface module with the two captive installation screws. Use a 3/16-inch flat-blade screwdriver to loosen the captive installation screws and remove the interface module filler plate (or the existing interface module) from the slot you want to use.

Step 3   Hold the interface module faceplate with one hand, and place your other hand under the interface module and guide it into the slot. Avoid touching the interface module components. (See Figure 2-19A.)

Step 4   Place the back of the interface module in the slot and align the notch on each side of the interface module with the groove in the slot. (See Figure 2-19B.)

Step 5   Keep the interface module at a 90-degree orientation to the backplane and carefully slide it into the slot until the faceplate makes contact with the release levers.

Step 6   Use the thumb and forefinger of each hand to simultaneously push the left lever and the right lever in until the interface module is fully seated in the backplane connector. (See Figure 2-19C.)


Caution   Always use the release levers when installing or removing the interface module. Leaving an interface module only partially seated in the backplane causes the system to halt and subsequently crash.

Step 7   Use a screwdriver to tighten the captive installation screws on the left and right ends of the interface module. (See Figure 2-19D.)

Step 8   Attach network interface cables or other devices to the interface ports.


Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.

Step 9   Turn the power on.

Step 10   Check the status of the interfaces. If this installation is a replacement interface module, use the show configuration or show interface atm [slot_num/mod_num/port_num] command to verify that the system has acknowledged the new interfaces and has brought them up.

Refer to your software publications for complete software configuration and command syntax information.


Figure 2-19   Installing an Interface Module




For detailed, up-to-date configuration instructions, see the following publications:

  • ATM Switch Router Software Configuration Guide
  • Software Configuration Guide—Catalyst 5000 Family, Catalyst 4000 Family, Catalyst 2926G Series, Catalyst 2948G, and Catalyst 2980G Switches

For command-line interface (CLI) command descriptions, see the following publications:

  • ATM Switch Command Reference
  • Command Reference—Catalyst 5000 Family, Catalyst 4000 Family, Catalyst 2926G Series, Catalyst 2948G, and Catalyst 2980G Switches

For help with troubleshooting the LightStream 1010 ATM switch, see the ATM Switch Router Troubleshooting Guide.