RJ 21

Answered Question
Apr 7th, 2008

I started a new position and I am seeing devices like Cisco Switches, routers with RJ21 connectors and I wonder what would be involve if we decide to change to rj45 and fiber blades/ports?

thx,

Masood

I have this problem too.
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Correct Answer by manmeetmarwah about 8 years 8 months ago

Hi Masood,

RJ 21 connectors are basically having 50 pins in a single connector, thus usually these connectors are used to connect Ethernet ports in bulk from a switch with RJ-21 ports to a CAT-5 or CAT-6 rated patch panel, or between two patch panels.i.e. each connector can support upto 12 ethernet ports thus you can save a lot of cabling, space and may be cost too.

If you decide to change them to RJ-45 or fiber ports, you need to change the cabling, cards on routers and switches and probably more space and cost would be involved in doing so.

* Pls rate if helps.

Manmeet

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Correct Answer
manmeetmarwah Tue, 04/08/2008 - 00:53

Hi Masood,

RJ 21 connectors are basically having 50 pins in a single connector, thus usually these connectors are used to connect Ethernet ports in bulk from a switch with RJ-21 ports to a CAT-5 or CAT-6 rated patch panel, or between two patch panels.i.e. each connector can support upto 12 ethernet ports thus you can save a lot of cabling, space and may be cost too.

If you decide to change them to RJ-45 or fiber ports, you need to change the cabling, cards on routers and switches and probably more space and cost would be involved in doing so.

* Pls rate if helps.

Manmeet

In case

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