2924 fiber cable connection?

TMM3

Hi,
I am looking to connect my 2924 switches together via fiber optic cable.

I have looked on the Cisco site and it states to use 62.5/125 micron multimode fiber optic cable with SC to SC style ends. I am fine with that part of it. The part that I am unfamiliar with is the connection part. Do you switch ends when connecting switches, such as red on tx of Aswitch and red on rx of Bswitch? I cannot find any specifics for this on the web.
If any of you would have any tips for me before I proceed I would appreciate an answer.

Thank you in advance.

t49

TMM3 wrote:

Hi,
I am looking to connect my 2924 switches together via fiber optic cable.

I have looked on the Cisco site and it states to use 62.5/125 micron multimode fiber optic cable with SC to SC style ends. I am fine with that part of it. The part that I am unfamiliar with is the connection part. Do you switch ends when connecting switches, such as red on tx of Aswitch and red on rx of Bswitch? I cannot find any specifics for this on the web.
If any of you would have any tips for me before I proceed I would appreciate an answer.

Thank you in advance.

U CAN ALWAYS DO TRIAL AND ERROR.

IT WILL ONLY WORK ONE WAY. BUT IF I REMEMBER CORRECTLY I THINK ITS RED ON TX ON A AND BLACK ON TX OF B-SWITCH, OR WHATEVER COLOUR YOUR SC HEAD IS.

APA

Yes cross it over

Fiber cables normally have each strand labelled by number

on switch A have 1 2
On switch B have 2 1

which ends up crossing the cable

TMM3

Thanks, I just wanted to make sure that I would not hurt anything or connect them in a way that would not be optimal.

APA

Really you should be using attentuators when connecting fiber cables over a short distance!!!

Have a read.... There are set minimum distances for fiber cables as the light can screw up the transceivers if the distance is too short..... Or you will get a flapping link due to the short distance.....

TMM3

Thanks for the tip, I will have to look into that.
The length of cable that I purchased is 1 meter, or 3 feet.

phreak

I'd put attenuators on that........



http://www.tessco.com/products/headerProductSearch.do?searchType=1&searchText=fiber+optic+attenuator&searchField=1

APA

Like I said TMM3...... Read up on the set minimum distances for fiber runs....

I just double-checked and most of the time attentuators are used on short than the minimum distance for SINGLE MODE FIBER runs.......... To prevent from overloading the transceiver...... Which is what we had to do here when testing our CWDM implementation......

Still worth checking out to see if there is a minimum distance for MM... I'm sure there has to be....

TMM3

Thank you for the tip.
Per this document below:
http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/installation/note/TomSinsn.html

I see that the minimum cable distance is 2 meters. I went ahead and ordered that distance of cabling so as not to use the attenuators.

APA

Good stuff..... I knew there had to be a minimum just didn't have the time to look it up

Glad to be of assistance!