Cisco NM-1A-OC3MM-EP= Datasheet download pdf (Page 4)

Connecting Cisco ATM Network Modules to the Network

ATM T3 and E3 Network Modules

Connecting Cisco ATM Network Modules to the Network

Figure 5 ATM Network Module with E3 Interface

Figure 6 ATM Network Module with one T3/E3 Interface

Note The ATM T3 network module has a sensitive receiver. If you use a short T3 cable, it is possible to

saturate the receiver, leading to bit errors. If this occurs, we recommend one of the following:

• Reduce the transmit level of the device attached to the T3 network module. Many devices have a line

build-out (LBO) configuration setting for this purpose.

• Insert a 4-dB attenuator on the receive side of the T3 network module.

Connecting ATM T3 and E3 Ports to the Network

Use a coaxial cable to connect the module BNC port to a T3 or E3 network.

ATM T3 Network Module and ATM E3 Network Module LEDs

The ATM T3 network module and the ATM E3 network module have the LEDs shown in Table 2.

ATM

1A-E3

30543

SEE MANUAL BEFORE INSTALLING NETWORK MODULE

FERF OOF AIS

RCLK

RXTX

ATM 0

TX RX

ATM

NM-1A-T3/E3

155792

SEE MANUAL BEFORE INSTALLING NETWORK MODULE

RXALMRXCRRXCLTXCLLP

ATM 0

Table 2 ATM T3 Network Module and ATM E3 Network module LEDs

LED Color Meaning

EN Green Module has passed its self-tests and is available to the router.

RCLK Green Receive clock has been detected.

FERF Yellow Far-end receive failure.

OOF Yellow Out of frame.

AIS Yellow Alarm indication signal.

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Cisco NM-1A-OC3MM-EP= Datasheet Page 4