3-12
Cisco ONS 15454 Reference Manual, R7.0
78-17191-01
Chapter 3 Electrical Cards
3.5 3.4.4 DS1/E1-56 Port-Level Indicators

3.4.4 DS1/E1-56 Port-Level Indicators

You can obtain the status of the DS1/E1-56 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.
3.5 DS3-12 and DS3N-12 Cards
Note For hardware specifications, see the “A.5.5 DS3-12 and DS3N-12 Card Specifications” section on
page A-19.
Note Any new features that are available as part of this software release are not enabled for this card.
The ONS 15454 DS3-12 card provides 12 Telcordia-compliant, GR-499 DS-3 ports per card. Each port
operates at 44.736 Mbps over a single 75-ohm 728A or equivalent coaxial span. The DS3-12 card
operates as a working or protect card in 1:1 protection schemes and as a working card in 1:N protection
schemes.
The DS3-12 card supports 1:1 protection with the proper backplane EIA. EIAs are available with BNC,
SMB, or SCSI (UBIC) connectors.
Caution When a protection switch moves traffic from the DS3-12 working/active card to the DS3-12
protect/standby card, ports on the now active/standby card cannot be taken out of service. Lost traffic
can result if you take a port out of service, even if the DS3-12 standby card no longer carries traffic.
Other than protection capabilities, the DS3-12 and DS3N-12 cards are identical. The DS3N-12 can
operate as the protect card in a 1:N (N <= 5) DS3 protection group. It has additional circuitry that is not
present on the basic DS3-12 card that allows it to protect up to five working DS3-12 cards. The basic
DS3-12 card can only function as the protect card for one other DS3-12 card.
Table 3-6 DS1/E1-56 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.