Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
DS3XM-6 Card
4.18.1 DS3XM-6 Hosted By XCVT
The DS3XM-6 card works in conjunction with the XCVT card. A single DS3XM-6 can demultiplex
(map down to a lower rate) six DS-3 signals into 168 VT1.5s that the XCVT card then manages and cross
connects. XCVT cards host a maximum of 336 bidirectional VT1.5s or two DS3XM-6 cards. In most
network configurations two DS3XM-6 cards are paired together as working and protect cards.
4.18.2 DS3XM-6 Card-Level Indicators
The DS3XM-6 card faceplate has three LEDs.
4.18.3 DS3XM-6 Port-Level Indicators
You can find the status of the six DS3XM-6 card ports using the LCD screen on the ONS 15454 fan-tray
assembly. Use the LCD to quickly view the status of any port or card slot; the screen displays the number
and severity of alarms for a given port or slot. See Chapter 1, “Alarm Troubleshooting” for a complete
description of the alarm messages.
4.18.4 DS3XM-6 Card Specifications
• DS3XM-6 Input
– Bit Rate: 44.736 Mbps +/- 20 ppm
– Frame Format: DS-3 ANSI T1.107-1988
– Line Code: B3ZS
– Termination: Unbalanced coaxial cable
– Input Impedance: 75 ohms +/-5%
– Cable Loss: Max 450 ft. 734A, RG-59, 728A/Max 79 ft. RG-179
• AIS: TR-TSY-000191-compliant
– DS3XM-6 Output
– Bit Rate: 44.736 Mbps +/- 20 ppm
– Frame Format: DS-3 ANSI T1.107-1988
– Line Code: B3ZS
Table 4-29 DS3XM-6 Card-Level Indicators
Card-Level Indicators Description
Red FAIL LED
The red FAIL LED indicates that the card’s processor is not ready. Replace
the card if the red FAIL LED persists.
ACT/STBY LED
Green (Active)
Amber (Standby)
When the ACTV/STBY LED is green, the DS3XM-6 card is operational and
ready to carry traffic. When the ACTV/STBY LED is amber, the DS3XM-6
card is operational and in standby in a 1:1 protection group.
Amber SF LED
The amber SF LED indicates a signal failure or condition such as LOS, LOF,
or high BER on one or more of the card’s ports.