Table of Contents

Cabling the DS3 and E3 Port Adapters

This chapter describes supported cabling configurations for the DS3 and E3 port adapters, and is organized into the following sections:

• DS3 and E3 Port Adapter Supported Interfaces
  
  
• DS3 and E3 Port Adapter Connectors
  
  
• DS3 and E3 Port Adapter LEDs
  
  

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

• Catalyst 8540 MSR Software Configuration Guide
  
  
• LightStream 1010 ATM Switch and Catalyst 8510 MSR Software Configuration Guide
  
  
• Catalyst 5000 Series Software Configuration Guide
  
  

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

• Catalyst 8540 MSR Command Reference
  
  
• LightStream 1010 ATM Switch and Catalyst 8510 MSR Command Reference
  
  
• Catalyst 5000 Series Command Reference
  
  

DS3 and E3 Port Adapter Supported Interfaces

The DS3 and E3 port adapters provide an interface to ATM switching fabrics for transmitting and receiving data at up to 45 Mbps (DS3) or 34 Mbps (E3) bidirectionally. The ATM port adapter can support interfaces that connect to the following physical layers:

• DS3 45-Mbps coaxial cable
  
  
• E3 34-Mbps coaxial cable
  
  

DS3 and E3 Port Adapter Connectors

To connect the DS3 port adapter and E3 port adapter to an external ATM network, use a 75-ohm RG-59 coaxial cable with bayonet-style twist-lock (BNC) connectors.
(See Figure 5-1.)

Caution The DS3 and E3 ports must be connected to a network termination unit (NTU). NTU devices should comply with UL 1950, CSA 950, EN 60950, and IEC 950 standards.

DS3 and E3 Port Adapter LEDs

The LEDs provide status information for the individual DS3 and E3 interface connections. The LEDs are described in Table 5-1 and shown in Figure 5-1.