Cisco Systems 15454 3.7 DS3i-N-12 Card

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Cisco ONS 15454 Reference Manual, R7.0

78-17191-01

Chapter 3 Electrical Cards

3.7 3.6.4 DS3/EC1-48 Port-Level Indicators

You can obtain the status of the DS3/EC1-48 card ports by 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.

3.7 DS3i-N-12 Card

Note For hardware specifications, see the “A.5.6 DS3i-N-12 Card Specifications” section on page A-20.

The 12-port ONS 15454 DS3i-N-12 card provides 12 ITU-T G.703, ITU-T G.704, and

Telcordia GR-499-CORE compliant DS-3 ports per card. Each port operates at 44.736 Mbps over a

75-ohm coaxial cable. The DS3i-N-12 card supports 1:1 or 1:N protection with the proper backplane

EIA. The DS3i-N-12 card works with the XCVT, XC10G, and XC-VXC-10G cross-connect cards. Four

sets of three adjacent DS-3 signals (Port 1 through Port 3, Port 4 through Port 6, Port 7 through Port 9,

and Port 10 through Port 12) are mapped to VC3s into a VC4 and transported as an STC-3c.

The DS3i-N-12 can also aggregate DS3 and E1 traffic and transport it between SONET and SDH

networks through AU4/STS 3 trunks, with the ability to add and drop DS3s to an STS3 trunk at

intermediate nodes.

You can install the DS3i-N-12 card in Slots 1 to 6 and 12 to 17. The DS3i-N-12 can operate as the protect

card in a 1:N (N <= 5) DS-3 protection group on a half-shelf basis, with protection cards in Slots 3 and

15. It has circuitry that allows it to protect up to five working DS3i-N-12 cards. With the proper

backplane EIA, the card supports BNC or SMB connectors. See the “7.2 Electrical Card Protection and

the Backplane” section on page 7-5 for more information about electrical card slot protection and

restrictions.

Figure 3-8 shows the DS3i-N-12 faceplate and block diagram.

Table 3-9 DS3/EC1-48 Card-Level Indicators

Card-Level Indicators Description

Red FAIL LED Indicates that the card processor is not ready. This LED is on during reset.

The FAIL LED flashes during the boot process. Replace the card if the red

FAIL LED persists in flashing.

ACT/STBY LED

Green (Active)

Amber (Standby)

When the ACT/STBY LED is green, the card is operational and ready to

carry traffic. When the ACT/STBY LED is amber, the card is operational and

in standby (protect) mode.

Amber SF LED Indicates a signal failure or condition such as LOS or LOF on one or more

card ports.