Specifications

4-42
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
DS1N-14 Card
4.13.1 DS1N-14 Hosted by XCVT
All 14 VT1.5 payloads from a DS1N-14 card are carried in a single STS-1 to the XC or XCVT card
where the payload is further aggregated for efficient STS-1 transport. XCVT cards host a maximum of
336 bidirectional VT1.5s.
4.13.2 DS1N-14 Card-Level Indicators
The DS1N-14 card faceplate has three LEDs.
4.13.3 DS1N-14 Port-Level Indicators
You can obtain the status of the 14 DS-1 ports using the LCD screen on the ONS 15454 fan-tray
assembly. Use the LCD to 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.
4.13.4 DS1N-14 Specifications
• DS1N-14 Input
– Bit Rate: 1.544 Mbps +/- 32 ppm
– Frame Format: Off, SF (D4), ESF
– Line Code: AMI, B8ZS
– Termination: Wire-wrap, AMP Champ
– Input Impedance:100 ohms
– Cable Loss: Max 655 ft. ABAM #22 AWG
– AIS: TR-TSY-000191-compliant
• DS1N-14 Output
– Bit Rate: 1.544 Mbps +/- 32 ppm
– Frame Format: Off, SF (D4), ESF
– Line Code: AMI, B8ZS
Table 4-24 DS1N-14 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 FAIL LED persists.
ACT/STBY LED
Green (Active)
Amber (Standby)
The ACT/STBY LED indicates when the DS1N-14 card is operational and
ready to carry traffic (green) or when the card is in standby mode (amber).
Amber SF LED
The amber SF LED indicates a signal failure or condition such as LOS, LOF
or high BERs on one or more of the card’s ports.