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New Member

Connecting two CRS-4 over 110Km lenght dark-fiber

I wonder if I want connect two CRS-4 over 110Km lenght and get 40G of througput whitout ONS 15454 MSTP DWDM infrastructure.

I am looking for lowering the cost for a two cities point-to-point carrier class connection with high throughput.

TIA

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: Connecting two CRS-4 over 110Km lenght dark-fiber

In DWDM platform it can go 1000Km without 3R regeneration means the signal still have to go through OPtical Amplifier & Dispersion modules but it does not any transponder to retime the signal(in simple words you are not converting from optical to electrical anywhere in 1000Km link).

Throughput will be 40G in both cases for single wavelngth/channel. Do you mean something else by throughput.

4 REPLIES
Silver

Re: Connecting two CRS-4 over 110Km lenght dark-fiber

Hi,

If you are talking about this module then long reach card is for 80Km and possibly will not go another 30Km.

Cisco CRS-1 4-Port OC-192c/STM-64 POS/DPT Interface Module

http://www.cisco.com/en/US/prod/collateral/routers/ps5763/ps5862/product_data_sheet09186a008022d5ef.html

You can try these 2 options,

1. You can first get fiber spec of the Dark fiber what is Dispsersion and PMD for that fiber then you can check with the spec of card how far it can go but looks very difficult to stretch 30Km.

2. YOu can see third party cheaper DWDM box with amplifier & dispersion module.

New Member

Re: Connecting two CRS-4 over 110Km lenght dark-fiber

Thank you for the reply.

As long as I can understand for it, it is possible to interconnect two CRS-4 by mean a dark-fiber without a DWDM transport system, if the distance and fiber parameters limits are meeted.

In the 1-Port OC-768C/STM-256C Tunable WDMPOS datasheet I can read that the targeted distance is 1000km for DWDM Line Interface, and 80 or 100Km for Single-channel optical link (without DWDM).

This would mean that a DWDM platform is needed to get the 1000km length?

What about the throughput when it is connected in single-chanel mode?

http://www.cisco.com/en/US/prod/collateral/routers/ps5763/product_data_sheet0900aecd80395bbe.html

I appreciate so much your attention.

Gustavo Espitia

Silver

Re: Connecting two CRS-4 over 110Km lenght dark-fiber

In DWDM platform it can go 1000Km without 3R regeneration means the signal still have to go through OPtical Amplifier & Dispersion modules but it does not any transponder to retime the signal(in simple words you are not converting from optical to electrical anywhere in 1000Km link).

Throughput will be 40G in both cases for single wavelngth/channel. Do you mean something else by throughput.

New Member

Re: Connecting two CRS-4 over 110Km lenght dark-fiber

Thanks Vishwamurti for the replies, they resolved my issue for now.

I hope I can come back with related questions when the link design be a bit more definited.

Sincerely,

Gustavo Espitia

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