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DS3-12 and DS3N-12 Cards
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3.5 DS3-12 and DS3N-12 Cards
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
or SMB 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.
3.5.1 DS3N-12 Features and Functions
Other than the 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 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.
Cisco ONS 15454 Reference Manual, R4.1.x and 4.5
3-10
Power level: 12.5 to 17.9 dBm centered @ 772 KHz, –16.4 to –11.1 dBm centered at 1544 KHz
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Pulse shape: GR-499-CORE Figure 9-5
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Pulse amplitude: 2.4 to 3.6 V peak-to-peak
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Loopback modes: Terminal and facility
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Electrical interface: BNC or SMB connectors
Surge protection: GR-1089
Operating temperature:
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C-Temp (15454-DS1-14 and 15454-DS1N-14): 0 to +55 degrees Celsius
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I-Temp (15454-DS1-14-T and 15454-DS1N-14-T): –40 to +65 degrees Celsius
Operating humidity: 5 to 95%, noncondensing
Power consumption: 12.60 W, 0.26 A, 43.02 BTU/hr
Dimensions:
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Height: 321.3 mm (12.650 in.)
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Width: 18.2 mm (0.716 in.)
Depth: 228.6 mm (9.000 in.)
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Card weight: 0.8 kg (1.8 lbs), 0.8 kg
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Compliance: ONS 15454 cards, when installed in a system, comply with these standards: Safety:
UL 1950, CSA C22.2 No. 950, EN 60950, IEC 60950
Chapter 3
Electrical Cards
February 2004
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