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Joined: May 2003
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Joined: May 2003
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Is there a different pinout when terminating a t3 vs a t1?
Corwyn
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Joined: Dec 2005
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Spam Hunter
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Spam Hunter
Joined: Dec 2005
Posts: 9,181 Likes: 9 |
I've never come across a pin-out situation with T3/DS3 cabling because such circuits generally use mini-coax cables and BNC connectors.
I Love FEATURE 00
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Joined: Jan 2005
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,397 Likes: 18 |
Oh yes, in fact there is no pinout at all. A T3 (DS3) requires a dual run of type 734 coax cable, terminated with BNC connectors.
Ed Vaughn, MBSWWYPBX
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Joined: May 2007
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Moderator-1A2, Cabling
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Moderator-1A2, Cabling
Joined: May 2007
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Just a minor addition:
A T-3 can also be run with 735 mini coax (with BNCs) for runs up to 300' or even fiber for longer distances. The old NEC Muxs (RC28D) among others used to have a fiber option.
T-1s are almost always delivered on shielded copper and the pinout for an RJ48X (the approved jack)is 1,2, (transmit) & 4,5 (receive).
A T-1 is a circuit with a bandwidth of 1.544 mbs. A T-3 is a circuit with a bandwidth of almost 45mbs and can contain 28 T-1s.
Sam
"Where are we going and why are we in this hand basket?"
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Joined: May 2003
Posts: 431
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Joined: May 2003
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Thank you guys. IT guy at it again, telling me that T2 pinout is 12 78. I wasn't sure so I didn't argue untill I checked with the experts 
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Joined: May 2002
Posts: 17,742 Likes: 36
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Retired phone dude
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Joined: May 2007
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Moderator-1A2, Cabling
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Moderator-1A2, Cabling
Joined: May 2007
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I believe a 56K pinout is 1,2,7,8. A T-2 is (was) a circuit that is no longer in use. It had a bandwidth of approximately 6 mbs (4 T-1s bonded together) it was designed for AT&T Picturphone's service. When Picturephone went south, so did the T-2.
Sam
"Where are we going and why are we in this hand basket?"
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Joined: May 2002
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Yes Sam you are correct on the pinout for digital data.
Retired phone dude
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Joined: May 2007
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Moderator-1A2, Cabling
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Moderator-1A2, Cabling
Joined: May 2007
Posts: 5,059 Likes: 6 |
Bill -
How is it that I can remember things that I haven't worked in for 20 years but can't remember what I had for breakfast?
Sam
"Where are we going and why are we in this hand basket?"
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Joined: Dec 2005
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Spam Hunter
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Spam Hunter
Joined: Dec 2005
Posts: 9,181 Likes: 9 |
When we provision a channelized DS3 in our Tellabs Titan 5500, we provision the T3, (7) T2s and (28) T1s. In the mux world, think of a T2 as a low-speed card.
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