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New Member

minimum cable distance between two 15454's , OC-3

Hello,

I am setting up two 15454's in a lab envirement, connected via four OC-3 cards (two cards each box, east and west, probably set up BLSR). With all the dangers of burining out optics, is there a minimum cable distance I need to consider while I do this? Do I need optical attenuators?

thanks

- Ted

1 REPLY
if
New Member

Re: minimum cable distance between two 15454's , OC-3

Hi Ted

This is from Cisco site regarding a 15454 and an OC-3 card

OC3 IR 4/STM1 SH 1310 Card Specifications

Line

Bit Rate: 155.52 MBits/s (Mbps)

Code: Scrambled NRZ

Fiber: 1310 nm single-mode

Loopback Modes: Terminal and Facility

Connector: SC

Compliance: ITU-T G.707, ITU-T G.957

Transmitter

Max. Transmitter Output Power: -8 dBm

Min. Transmitter Output Power: -15 dBm

Center Wavelength: 1293 nm - 1334 nm

Nominal Wavelength: 1310 nm

Transmitter: Fabry Perot laser

Receiver

Max. Receiver Level: -8 dBm at BER 1 * 10-10

Min. Receiver Level: -28 dBm at BER 1 * 10-10

Receiver: InGaAs/InP photo detector

Link Loss Budget: 13 dB

http://www.cisco.com/univercd/cc/td/doc/product/ong/15400/454sdhsp/stm1sh.htm

As yoy can se the maximum transmitter power is -8dBm,

the Max. Receiver Level: -8 dBm

so there should be no problem.

The power budget ca be easily calculatet

Min. Transmitter Output Power: -15 dBm

minus

Min. Receiver Level: -28 dBm

= 13dB ( as stated)

Ian Fudge

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