Category Archives: Connections

COMMENTS ON DRAFT AES72-XXXX

AES, Audio, Audio over CAT5, Balancing, Connections, Interface, Label Area, Pinout, QTP, Quad Twisted Pair, Rhumor, RJ45, T-568A, Testing, Uncategorized

from:

http://www.aes.org/standards/comments/comments-draft-aes72-xxxx-190215.cfm

Problems of Assigning Channels Based on Color alone

AES, Audio over CAT5, Connections, IDentification Area, NAB, Pinout, Presentation, RJ45, T-568A

The need for 8p8c to 8p8c connectivity is of the utmost importance.

Second to is the “field breakouts”. The colour plays a huge part.

I’ve been noticing more and more breakout tails entering the market, so it needs addressing. We cannot use the 25 pair or TIA colour codes to determine the channels.

For the field, I would expect a simple visual inspection to influence deployment decisions. Looking at the solid colours to determine the channel order. Below is an image that has been the result of many conversations. An observation I’d like to present: If you look at RJ45 connectors the solid colours are visible. The order of the solid colour should dictate the channel order. Pair three in both cases is split around pair 2. Pins of multiples of 2 are considered “Hot”. QTP-B is based on the TIA-B wiring scheme.

This is where a lot of QTP development started. How to terminate this twisted 3M ribbon cable to an RJ45 Jack. Since it would not fit and CAT cable is everywhere…
QTP-A and QTP-B

The Audio Engineering Society and QTP

AES, Audio, Audio over CAT5, Connections, DB25, Interface, News, Pinout, Presentation, QTP to DB25, QTP to XLR, RJ45

QTP-RJ45 AES Journal
4 Channels of audio over CAT5

QTP User guide Expands with Support from Ward-Beck Systems

Audio over CAT5, CAT6-Audio Transfer, Connections, DB25, Interface, QTP, QTP to DB25, QTP to XLR, Quad Twisted Pair, RJ45

The B.O.B.Cats are here!

Audio over CAT5, Connections, Interface, NAB, Pinout, QTP to XLR, RJ45, TRADESHOW, XLR

New for NAB 2017 is the QTP Break Out Boxes for Category cable! We’re excited at the reactions of those who’ve said “It’s about time!”

Pricing and dealer information is coming soon!

Making a QTP patching system using DB25 patchbays

Audio over CAT5, Balancing, CAT6-Audio Transfer, Connections, DB25, IDentification Area, Interface, Label Area, Presentation, QTP, QTP to DB25, Quad Twisted Pair, Rhumor, T-568A, Testing

Dual row, 24 Channel by 24 Channel
DB25 to DB25 patchbay wiring price:
(12) QTP-DB25M $12.04 = $144.48
(24) CAT6-10-Green $7.80 = $187.20
6 cable price: $331.58

Checking the spacing fit for QTP-DB25M adapters.

Not a single problem detected. With all signals balanced and power on two different phases, no measurable induced noise detected.

Ask us about Bit-Tree patchbays

A Lexicon 480L with a QTP and LTP back

Audio, Audio over CAT5, CAT6-Audio Transfer, Connections, DB25, Interface, QTP, QTP to DB25, QTP to XLR, Quad Twisted Pair, Testing, XLR

Blue are the boys, White are the Girls.

QTP DB25 Pin out standards

AES, Connections, DB25, Pinout, QTP, QTP to DB25, RJ45, T-568A

I had an integrator call today asking what the compatible pin outs of the QTP-DB25 adapters were .

QTP-DB25M and QTP-DB25M use the Tascam DB25 Pinout.
Channels 1-4 terminate to one RJ45 and 5-8 to the other.

If you are using AES in and out the pin out is identical.
CH 1-4 are IN 1-4 and CH 5-8 are OUTPUT 5-8

The Third Compatible pin out is the Yamaha AES pin out. The QTP-DB25Y is only available in a male DB25 connector. The IN the first RJ45 and OUT the second.