Specifications

Connecting Cisco ATM Network Modules to the Network

ATM OC-3 Network Modules

Connecting Cisco ATM Network Modules to the Network

ATM T3/E3 Network Module LEDs

Table 3 shows the LEDs for the combined ATM T3/E3 network module.

ATM OC-3 Network Modules

ATM OC-3 network modules provide full 155-Mbps ATM connectivity, including STS-3c and STM-1

framing, for high-bandwidth data applications and voice-data integration applications. Characteristics

and installation of these modules are described in the following sections.

• OC-3 Network Modules for Cisco 3600 and Cisco 3700 Series Routers, page 5

• ATM-OC3-POM Network Module for Cisco 3800 Series Routers, page 10

• Laser Safety Guidelines, page 13

• Fiber-Optic Transmission Specifications, page 14

OC-3 Network Modules for Cisco 3600 and Cisco 3700 Series Routers

This section describes the following OC-3 (Optical Carrier level 3) network modules for most

Cisco 3600 and Cisco 3700 series routers.

Note ATM OC-3 network modules are not supported by the Cisco 3631 router.

The following modules are supported on the Cisco 3600 series routers and the Cisco 3725 router:

• NM-1A-OC3MM provides a multimode (MM) fiber uplink port. See Figure 7.

• NM-1A-OC3SMI provides a single-mode intermediate-reach (SMI) fiber uplink port. See Figure 8.

• NM-1A-OC3SML provides a single-mode long-reach (SML) fiber uplink port. See Figure 9.

The following modules are supported on the Cisco 3745 router:

• NM-1A-OC3MM-EP provides an MM fiber uplink port with enhanced performance. See Figure 7

for a similar faceplate.

• NM-1A-OC3SMI-EP provides an SMI fiber uplink port with enhanced performance. See Figure 8

for a similar faceplate.

• NM-1A-OC3SML-EP provides an SML fiber uplink port with enhanced performance. See Figure 9

for a similar faceplate.

The following modules are supported on the Cisco 3600 series routers:

Table 3 ATM T3/E3 Network Module LEDs

LED Color Meaning

TXCL Green Cell transmitted.

RXCL Green Cell received.

RXALM Yellow Alarm indication signal.

RXCR Green Carrier present.

Loopback LED Green Loopback