Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
EC1-12 Card
4.11.1 EC1-12 Hosted by XCVT
All 14 VT1.5 payloads from a EC1-12 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.
4.11.2 EC1-12 Card-Level Indicators
The EC1-12 card faceplate has three card-level LEDs.
4.11.3 EC1-12 Port-Level Indicators
You can obtain the status of the EC1-12 card ports using the LCD screen on the ONS 15454 fan-tray.
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.
4.11.4 EC1-12 Specifications
• EC1-12 Input
– Bit Rate: 51.84 Mbps +/- 20 ppm
– Frame Format: SONET
– 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
• EC1-12 Output
– Bit Rate: 51.84 Mbps +/- 20 ppm
– Frame Format: SONET
– Line Code: B3ZS
– Termination: Unbalanced coaxial cable
Table 4-22 EC1-12 Card-Level Indicators
Card-Level Indicators Description
Red FAIL LED
The red FAIL LED signifies that the EC1-12 card’s processor is not ready.
Replace the unit if the FAIL LED persists.
Green ACT LED
The green ACT LED indicates that the EC1-12 card is operational and ready
to carry traffic.
Amber SF LED
The amber SF LED indicates a signal failure or condition such as loss of
signal (LOS), loss of frame (LOF) or high bit error rate (BER) on one or
more of the card’s ports.