T1 and E1 Port Adapters

This chapter describes the T1 and E1 port adapters that are supported in the following ATM systems:

• Catalyst 8540 MSR
  
  
• Catalyst 8510 MSR
  
  
• LightStream 1010
  
  
• Catalyst 5500
  
  

This chapter includes the following sections:

• About T1 and E1 Port Adapters
  
  
• Cabling T1 and E1 Port Adapters
  
  

About T1 and E1 Port Adapters

The T1 and E1 trunk port adapters are used for intercampus or wide-area links. The T1 and E1 port adapters support UTP and BNC connectors.

Interface Ports Supported

The ATM switch router supports any port adapter combination required. Table 10-1 identifies the maximum number of T1 and E1 interface ports supported in each system.

Figure 10-1 shows a T1 trunk port adapter that supports UTP connectors.

Figure 10-1: T1 Trunk Port Adapter with UTP Connectors

ATM Connections Supported

The T1 and E1 port adapters provide ATM connectivity to the WAN through T1 or E1 trunk lines, as shown in Figure 10-2.

Figure 10-2: T1 Trunk Port Adapter ATM WAN Connections

Regulatory Approvals and Compliances

The T1 port adapter meets the following regulatory approvals and compliances:

• JATE Approval
  
  
• FCC Part 68 Notice
  
  

JATE Approval

The T1 port adapter meets Japan Approvals Institute for Telecommunications Equipment (JATE) approval. See Table 10-2 for JATE approval details for the T1 port adapter.

FCC Part 68 Notice

The T1 port adapter complies with Part 68 of the FCC rules. On the tray of this equipment is a label that contains, among other information, the FCC registration number. If requested, this information must be provided to the telephone company.

This equipment cannot be used on telephone company-provided coin services. Connection to the Party Line Service is subject to state tariffs.

If this equipment causes harm to the telephone network, the telephone company notifies you in advance that temporary discontinuance of service might be required. If advance notice is not practical, the telephone company notifies you as soon as possible. Also, you are advised of your right to file a complaint with the FCC if you believe it is necessary.

The telephone company can make changes in its facilities, equipment, operations, or procedures that could affect the operation of the equipment. If this happens, the telephone company provides advance notice so you can make the necessary modifications to maintain uninterrupted service.

If trouble is experienced with this equipment, please contact us for repair and warranty information. If the trouble is causing harm to the telephone network, the telephone company can request that you remove the equipment from the network until the problem is resolved.

We recommend that you install an AC surge arrestor in the AC outlet to which this device is connected. This is to avoid equipment damage caused by local lightning strikes and other electrical surges.

This equipment uses Uniform Service Order Code (USOC) jacks as shown in Table 10-3.

Cabling T1 and E1 Port Adapters

This section describes supported cabling configurations for the T1 (1.544-Mbps) and E1 (2.048-Mbps) ATM port adapters, which provide T1 UTP, E1 UTP, and E1 coaxial connections.

Note   All ATM interfaces are full duplex. You must use the appropriate ATM interface cable to connect the ATM BNC or UTP port adapter interface with an external ATM network.

T1 and E1 Port Adapter Supported Interfaces

The T1 and E1 port adapters provide an interface to ATM switching fabrics for transmitting and receiving data at 1.544 and 2.048 Mbps bidirectionally. The actual data rate is determined by the physical layer interface module (PLIM). The T1 and E1 port adapters can support interfaces that connect to the following physical layers:

• T1 1.544-Mbps UTP cable with RJ-45 connector
  
  
• E1 2.048-Mbps UTP cable with RJ-45 connector
  
  
• E1 2.048-Mbps coaxial cable with BNC connector
  
  

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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.

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Caution   Connect the T1 and E1 ports to a network termination unit (NTU). NTU devices should comply with UL 1950, CSA 950, EN 60950, and IEC 950 standards.

Note   See Table B-1 for cabling requirements.

T1 and E1 Port Adapter Trunk Connectors

For T1 and E1 trunks, use an RJ-48 connector and UTP cable to connect the T1 and E1 trunk port adapter with the WAN or other switch routers. (See Figure 10-3.)

For BNC E1 connections, use the 75-ohm, RG-59 coaxial cable with bayonet-style, twist-lock (BNC) connectors to connect the E1 port adapter with the WAN or external ATM switch router.

Note   See the "RJ-48c Connector Pinouts" section for RJ-48c connector information. See the "ATM Network Connections" section for more information about the BNC connector with a coaxial interface cable.

Figure 10-3: T1 and E1 Trunk Connections and LEDs

T1 and E1 Port Adapter LEDs

The LEDs provide status information for the individual T1 and E1 interface connections. The LEDs are shown in Figure 10-3 and described in Table 10-4.