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Table of Contents

The T1 and E1 Port Adapters

The T1 and E1 Port Adapters

This chapter describes the T1and E1 port adapters that are supported in the following systems:

This chapter includes the following sections:

Overview of the 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 supports any port adapter combination required. Table 8-1 identifies the maximum number of T1 and E1 interface ports supported in each system.


Table 8-1: Maximum Interface Ports Supported by System Type
System Type Maximum Number of T1 and E1 Interface Ports

Catalyst 8540 MSR

64

Catalyst 8510 MSR

32

Catalyst 5500

32

LightStream 1010

32

Figure 8-1 shows a T1 trunk port adapter that supports UTP connectors.


Figure 8-1: 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 8-2.


Figure 8-2: T1 Trunk Port Adapter ATM WAN Connections


Regulatory Approvals

The T1 port adapter meets Japan Approvals Institute for Telecommunications Equipment (JATE) approval. See Table 8-2 for JATE approval details for the T1 port adapter.


Table 8-2: JATE Approval for the T1 Port Adapter
Applicant Name Model Number Approval Number Date of Approval

Nihon Cisco Systems

WAI-T1-4BNC, WAI-T1C-4BNC

N97-K021-0

April 30, 1997

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 the customer 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 in order for you to 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 8-3.


Table 8-3: USOC Jacks for T1 and E1 Port Adapters
Model Number Facility Interface Code Service Order Code Jack Type

WAI-T1-4RJ48

04DU9-BN

6.0N

N/A

WAI-T1-4RJ48

04DU9-DN

6.0N

N/A

WAI-T1-4RJ48

04DU9-1KN

6.0N

N/A

WAI-T1-4RJ48

04DU9-1SN

6.0N

N/A

WAI-T1-4RJ48

04DU9-1ZN

6.0N

N/A

Cabling the 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:

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.
Caution
The T1 and E1 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.
Note For detailed descriptions of ATM cabling requirements, see the "ATM Connection Equipment Requirements" section.

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 switches. (See Figure 8-3.)

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.

Note For a description of these connectors, see the "ATM Connection Equipment Requirements" section. (Figure 2-3 shows an RJ-48 connector. Figure 2-4 shows a BNC connector with a coaxial interface cable.)

Figure 8-3: 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 described in Table 8-4 and shown in Figure 8-3.


Table 8-4: T1 and E1 Port Adapter LED Descriptions
LED Description

CD (carrier detect)

Off---Carrier detect signal not received
Green---Carrier detect signal received

RX (receive)

Off---No receive line activity
Flashing green---Cells being received: blinks every five seconds and pulse rate increases with data rate
Flashing yellow---Loopback
Red---Alarm (LOF1, LCD2, AIS3)

TX (transmit)

Off---No transmit line activity
Flashing green---Cells being transmitted: pulse rate increases with data rate
Flashing yellow---Loopback
Steady yellow---Alarm FERF4

1LOF = loss of frame.
2LCD = loss of cell delineation.
3AIS = alarm indication signal.
4FERF = far-end receive failure.


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Posted: Thu May 6 13:50:11 PDT 1999
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