How to convert T1 DB9 to RJ45 cable? 2

[luddyspence]

How can I convert a DB9 connector to a RJ45 connection?

The Notel PBX has a DB9 connector for the T1, but the PBX will be removed and the same T1 circuit will be used with a RJ45 connector. I want to make up a cable with a DB9 end and the other end will have a RJ45 end. What should the pin out be, for the DB9 end? A diagram would be helpful if possible.

 

[hawks]

If you are removing the PBX then why do you need the DB9? You can also get an RJ45 to DB9 adaptor. I know the DB9 uses pins 1, 3, 9, & 11 I just can not remember where they go to the RJ plug, I think it was 1, 2, 4 & 5.

 

[tnphoneman]

Depends on if you need a cross over cable or not.

Look again before you cut over. You will need a DB15 connector not a DB9

Option 1

DB 15 RJ
1 1
9 2
3 4
11 5

Option 2

DB 15 RJ
1 4
9 5
3 1
11 2

I have had to use either option on various sites

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[telebub]

Are you sure you are not talking about a DB15 connector? As Hawks says, a DB15 connector uses pins 1, 3, 9, and 11. The RJ45 part uses 1,2,4,5.

War Eagle!
Lions Baseball '09!

 

[hawks]

Good catch I meant DB15
have a star

 

[luddyspence]

Yes, it is a DB15 T1 connector. The PBX will be replaced with a VoIP solution and so the T1 circuit will be used on non-pbx equipment.

When would I use option 1 or option 2 pin out?

 

[tnphoneman]

You would have to look up the pinouts for both and see if it is transmit or receive and wire accordingly. I usually have one of each and try them until one works and then make the rest to match.

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[mwpage2001]

Check out Mertek Industries' T1 adapters. (

http://www.mertekjcs.com)

They make an adapter that allows you connect RJ45 directly to the PBX. Their products are also approved by Nortel.

 

[johnpoole]

in tpmans wiring scheme, opt 1 is with a csu, 2 is without.. but as posted, build both and see which one greens it up..

hint: not sure if your counting the pins right? loop one and two to four and five (rj) that will bring it up to a loop.. so will pins 1 and 3 to 9 and 11 or the db side..


from the smart jack.. pins 1&2 are common as well as pins 4 and 5... inside of the smart they are the same conductor..

john poole
bellsouth business
columbia,sc

 

[hawks]

Try this

http://www.national-tech.com/specs/db15-to-rj45/32d1-18200.htm

 

[luddyspence]

Can anyone verify the colours for the RJ45 pinouts from the DB15 conector?
Is this cirrect for the RJ45 side:
1 is blue
2 is orange
4 is red
5 is green

 

[tnphoneman]

Not sure about the order because I look at the paper that comes in the package every time but yes those are the colors used.

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[bigindian65]

1 red
3 org
9 green
11 blue

patch pannel CAT5 to back of PBX DB15 Duel PRI card

(pinout is diff if for a dialer audio path)

Mato' Was'aka