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#452426 06/01/09 03:11 PM
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Is there a different pinout when terminating a t3 vs a t1?


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#452427 06/01/09 03:32 PM
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I've never come across a pin-out situation with T3/DS3 cabling because such circuits generally use mini-coax cables and BNC connectors.


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#452428 06/01/09 03:33 PM
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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
#452429 06/02/09 01:16 AM
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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


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#452430 06/02/09 06:03 AM
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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 smile

#452431 06/02/09 06:24 AM
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IT=instant trouble.


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#452432 06/02/09 06:35 AM
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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


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#452433 06/02/09 08:02 AM
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Yes Sam you are correct on the pinout for digital data.


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#452434 06/02/09 01:07 PM
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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


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#452435 06/02/09 01:59 PM
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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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#452436 06/03/09 12:58 AM
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Dex -

You're right. Many mux's contain "Low Speed" (T-2) cards or segments. It's just that no one orders a T-2 anymore. I don't think it's even an available option on any of the Carriers order forms any more. I would be surprised if anyone had seen a request for one in the last 20 years.

Sam


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#452437 06/03/09 01:12 AM
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I suppose ordering a T2 circuit would be like using a $2.00 bill to pay for something.


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#452438 06/03/09 03:24 AM
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Quote
Originally posted by Silversam:
Dex -

You're right. Many mux's contain "Low Speed" (T-2) cards or segments. It's just that no one orders a T-2 anymore. I don't think it's even an available option on any of the Carriers order forms any more. I would be surprised if anyone had seen a request for one in the last 20 years.

Sam
In the Telco world T2 (TDM) still looks to be an “orderable option.” eek (I was surprised to find coding that was still valid for it... Who knew! shocked LOL ) I’ve NEVER seen an order for a T2 and honestly would not know of a way to even deliver it to a customer/end-user.

The SONET equivalent of T2 is VT6 (virtual tributary) 6.912 Mbs would be a valid option but I'd only expect to see it being used between two carriers (IXC’s, LECs, CLECs etc) … Or as Dex mentioned for internal usage only, in order to drop down a MUX low-speed card (quad-card.)


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#452439 06/12/09 03:31 PM
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call me weird, but I spend two dollar bills regularly. I've found that I get better service because the money I spend is memorable. Not to mention that because I use twos that I also tip slightly more because of it which in turns leads to better service when I eat out. Everyone remembers the guy spending Tom.

Where do I get them? The commercial teller at most non-FCU banks. Though my credit union stocked them before I joined anyway.


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Always looking for the next project to be done.
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