Cisco ONS 15454 EC1-12 User Manual

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Cisco ONS 15454 Reference Manual, R4.1.x and 4.5
February 2004
Chapter 3 Electrical Cards
DS3-12E and DS3N-12E Cards
• Operating humidity: 5 to 95%, noncondensing
• Power consumption: 38.20 W, 0.79 A, 130.43 BTU/hr
• Dimensions:
– Height: 321.3 mm (12.650 in.)
– Width: 18.2 mm (0.716 in.)
– Depth: 228.6 mm (9.000 in.)
– DS3-12: Card weight: 1.7 lbs, 0.7 kg
– DS3N-12: Card weight: 0.8 kg (1.8 lbs), 0.8 kg
• 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
3.6 DS3-12E and DS3N-12E Cards
The ONS 15454 DS3-12E card provides 12 Telcordia-compliant ports per card. Each port operates at
44.736 Mbps over a single 75 ohm 728A or equivalent coaxial span. The DS3-12E card provides
enhanced performance monitoring functions. The DS3-12E can detect several different errored logic bits
within a DS3 frame. This function allows the ONS 15454 to identify a degrading DS3 facility caused by
upstream electronics (DS3 Framer). In addition, DS3 frame format auto detection and J1 path trace are
supported. By monitoring additional overhead in the DS3 frame, subtle network degradations can be
detected.
The following list summarizes DS3-12E card features:
• Provisionable framing format M23, C-bit or unframed
• Autorecognition and provisioning of incoming framing
• P-bit monitoring
• C-bit parity monitoring
• X-bit monitoring
• M-bit monitoring
• F-bit monitoring
• Far-end block errors (FEBE) monitoring
• Far-end alarm and control (FEAC) status and loop code detection
• Path trace byte support with TIM-P alarm generation
The DS3-12E supports a 1:1 protection scheme, meaning it can operate as the protect card for one other
DS3-12E card.
3.6.1 DS3N-12E Features and Functions
The DS3N-12E can operate as the protect card in a 1:N (N<5) DS3 protection group. It has additional
circuitry not present on the basic DS3-12E card that allows it to protect up to five working DS3-12E
cards. The basic DS3-12E card can only function as the protect card for one other DS3-12E card.

Cisco ONS 15454 EC1-12 Specifications

General

Interface Type	Optical
Wavelength	1310 nm
Ports	12
Storage Temperature	-40°C to 70°C
Humidity	5% to 95% (non-condensing)