The DS3 and E3 Port Adapters

This chapter describes the DS3 and E3 port adapters that are supported in the following systems:

Catalyst 8540 MSR
Catalyst 8510 MSR
Catalyst 5500
LightStream 1010

This chapter includes the following sections:

Overview of the DS3 and E3 Port Adapters

The DS3 and E3 port adapters are used for wide-area connectivity, to link multiple campuses, or to connect to public networks. The DS3 and E3 port adapters support standard BNC coaxial cable connectors.

Interface Ports Supported

The ATM switch supports any port adapter combination required. Table 13-1 identifies the maximum number of DS3 or E3 interface ports supported in each system.

Table 13-1: Maximum Interface Ports Supported by System Type

System Type Max. No. of DS3 or E3 Interface Ports

Catalyst 8540 MSR

64

Catalyst 8510 MSR

32

Catalyst 5500

32

LightStream 1010

32

System Type	Max. No. of DS3 or E3 Interface Ports
Catalyst 8540 MSR	64
Catalyst 8510 MSR	32
Catalyst 5500	32
LightStream 1010	32

Figure 13-1 shows a DS3 port adapter with BNC connectors.

Figure 13-1: DS3 Port Adapter with BNC Connectors

ATM Connections Supported

The DS3 and E3 port adapters can provide intercampus and enterprise WAN connections, as shown in Figure 13-2 .

Figure 13-2: DS3 Port Adapter ATM Intercampus and WAN Connections

The DS3 can also be used to link a router at a customer site to a central office, as shown in Figure 13-3.

Figure 13-3: DS3 Port Adapter ATM Customer-Site-to-Central-Office Connection

In addition, the DS3 can link an ATM switch at a customer site to a central office by way of a virtual path tunnel, as shown in Figure 13-4.

Figure 13-4: DS3 Port Adapter ATM with Virtual Path Tunnel Connection

Note If your connections include a virtual path tunnel, the FC-3 must be included in the configuration.

JATE Approval

The DS3 port adapter meets the Japan Approvals Institute for Telecommunications Equipment (JATE) approval. See Table 13-2 for JATE approval details for the DS3 port adapter.

Applicant Name	Model No.	Approval No.	Date of Approval
Nihon Cisco Systems	WAI-T1-4BNC, WAI-T1C-4BNC	N97-K021-0	April 30, 1997
Nihon Cisco Systems	C85MS-IDS3-FRBNC	N98-N343-0	October 21, 1998

Table 13-2: JATE Approval for the DS3 Port Adapter

Applicant Name Model No. Approval No. Date of Approval

Nihon Cisco Systems

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

N97-K021-0

April 30, 1997

Nihon Cisco Systems

C85MS-IDS3-FRBNC

N98-N343-0

October 21, 1998

Cabling the DS3 and E3 Port Adapters

This section describes supported cabling configurations for the DS3 and E3 port adapters.

Note All ATM interfaces are full duplex. You must use the appropriate ATM interface cable to connect the ATM DS3 or E3 port adapter interface with an external ATM network.

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

Note For descriptions of ATM cabling requirements, see the "ATM Connection Equipment Requirements" section.

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 13-5.)

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.

Note For a description of these connectors, see the "ATM Connection Equipment Requirements" section. (Figure 2-5 shows a coaxial interface cable with BNC connectors.)

Figure 13-5: DS3 and E3 Coaxial Connections and LEDs

DS3 and E3 Port Adapter LEDs

The LEDs provide status information for the individual DS3 and E3 interface connections. The LEDs are shown in Figure 13-5 and described in Table 13-3.

Table 13-3: DS3 and E3 Port Adapter LED Descriptions

LED State Description

CD (carrier detect)

Off
Green

Carrier detect signal not received
Carrier detect signal received

RX (receive)

Off
Flashing green
Red

LOS¹ or shutdown
Cells being received
Alarm (LOF², LCD³, AIS⁴)

TX (transmit)

Off
Flashing green
Steady yellow

No transmit line activity
Cells being transmitted
Alarm FERF⁵

¹LOS = loss of signal
²LOF = loss of frame
³LCD = loss of cell delineation
⁴AIS = alarm indication signal
⁵FERF = far-end receive failure

LED	State	Description
CD (carrier detect)	Off Green	Carrier detect signal not received Carrier detect signal received
RX (receive)	Off Flashing green Red	LOS¹ or shutdown Cells being received Alarm (LOF², LCD³, AIS⁴)
TX (transmit)	Off Flashing green Steady yellow	No transmit line activity Cells being transmitted Alarm FERF⁵

Table of Contents

The DS3 and E3 Port Adapters