Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

RJ 21

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

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: RJ 21

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

2 REPLIES
New Member

Re: RJ 21

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

New Member

Re: RJ 21

Thanks man. it did answer my question.

Masood

239
Views
0
Helpful
2
Replies