Category Archives: AES

Presentation – Audio Engineering Society – Standards: AES72 QTP-4 Everyone

October 1, 2021AES, Audio over CAT5, Quad Twisted Pairadmin

COMMENTS ON DRAFT AES72-XXXX

March 19, 2019AES, Audio, Audio over CAT5, Balancing, Connections, Interface, Label Area, Pinout, QTP, Quad Twisted Pair, Rhumor, RJ45, T-568A, Testing, Uncategorizedadmin

from:

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

AES X246 out for comment

March 3, 2019AES, Audio over CAT5, CAT6-Audio Transfer, News, Pinout, QTP, Quad Twisted Pair, Rhumor, RJ45, T-568Aadmin

AES X246 proposal for standards is out from the SC-02-05 working group.

This give the working group an opportunity to comment on a pattern describing Pair order and caveats of using QTP.

Not letting anything out of the bag because the manufacturers are mixed around.

Something magical about the Quad choice. QTP-4-Everyone

Problems of Assigning Channels Based on Color alone

October 12, 2018AES, Audio over CAT5, Connections, IDentification Area, NAB, Pinout, Presentation, RJ45, T-568Aadmin

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

May 24, 2018AES, Audio, Audio over CAT5, Connections, DB25, Interface, News, Pinout, Presentation, QTP to DB25, QTP to XLR, RJ45admin

QTP-RJ45 AES Journal
4 Channels of audio over CAT5

QTP DB25 Pin out standards

May 5, 2015AES, Connections, DB25, Pinout, QTP, QTP to DB25, RJ45, T-568Aadmin

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.