Cisco 2600/2600XM AND 3600 SERIES 8 PORT T1 ATM MODULE WITH IMA Guide De Spécification

Table 3 Cisco ATM Forum IMA Version 1.0 Product Compatibility Matrix

• NM-4T1-IMA, NM-8T1-IMA: from 1.544 to 12.352

Mbps, in 1.544 Mbps increments

• NM-4E1-IMA, NM-8E1-IMA: from 2.048 to 16.384

Mbps, in 2.048 Mbps increments

• Line rate: 1.544 Mbps + 50bps

• Line code: binary 8-zero substitution (B8ZS) per ANSI

T1.408

• Line framing: extended superframe format (extended

superframe (ESF) 24-frame multiframe) per ANSI T1.408

• Input jitter tolerance: per ATT TR 62411

• Output jitter generation: per ATT TR62411 using normal

mode sync

• Physical layer alarms: Loss of signal (LoS), out of frame

(OF), alarm indication signal (AIS) remote deflect

identification (RDI)

• Line rate: 2.048 Mbps + 50 bps

• Line code: HDB3, AMI

• Line framing: 16-frame multiframe per ITU G.704

• Input jitter tolerance: per ITU G.823 for 2.048 Mbps

operation

• Output jitter generation: per ITU G.823 for 2.048 Mbps

operation

• Physical layer alarms: LoS, OF, AIS, RDI

All four network modules have an enable (EN) LED. The

enable LED indicates that the module has passed its self-tests

and is available to the router. T1/E1 IMA network modules

have the additional LEDs shown in Table 4.

Table 4 T1/E1 IMA Network Module LED Meaning

• LoS

• Loss of frame (LF)

• Loss of signaling multiframe

• Loss of CRC multiframe

• Reception of remote alarm signal

• Remote multiframe alarm signal

• Alarm indication signal (AIS)

• Timeslot 16 AIS

Multiple loopback modes are supported for diagnostics, fault

isolation, and network compliance. The Line Interface Unit

(LIU) supports five loopback modes. Each port can loopback

the incoming signal through the front connector (RJ-45) and

the LIU in several ways:

• Local loop—The transmit data and clock inputs from the

framer are looped back to the receive data and clock

outputs.

• Analog loopback—The receiver inputs from the telco line

are disconnected and transmitter outputs are routed back

into the receiver inputs.

4 and 8-port T1/E1 ATM network modules

12.0(5)T

8-port T1/E1 ATM port adapters

12.0(5)XE, 12.1(1)T

®

8-port IMA PAM

Q3CY99

8-port IMA (AUSM/AUSM-B)

Release 5.x

8-port IMA (AUSM/B)

Release 1.1

Yellow

Alarm indicating loss of signal, loss of frame, or
unavailability because of excessive errors.

Yellow

Controller local loopback.

Green

Carrier received on telco links.

Green

Enabled—Network module is communicating
correctly to the bus