ASTRO DIU 3000 - MRTI 2000

ASTROMODAT · Post by **ASTROMODAT** » Mon Nov 18, 2002 6:20 pm

Motorola's price book seems to have a possible conflict, so I was wondering if someone on the Batboard might be able to please help clarify.

There is a custom made Motorola interconnection cable (with a custom plug on each end) that connects the MRTI 2000 phone patch to/from the ASTRO DIU 3000. Under the ASTRO DIU 3000 section of the Motorola price book, it calls out this cable to be an FKN 4389 ($50). Or, if this cable is included as an accessory item with the DIU 3000 from the factory as part of the original order, it specifies the C54 option ($75) on the STIC-1 order form (I think this has since been listed as a C54BF, per xmo - Thanks!). BTW, it seems strange that the price with the factory order ($75) is HIGHER than the after sale price from APC at $50. Usually, the reverse is the case.

However, under the MRTI 2000 section of the Motorola price book, it calls out this (same?) cable to be a CDN 6021 ($95) to connect the MRTI 2000 to/from the ASTRO/DIU. The MRTI 2000 price sheet does not even refer to the newer ASTRO DIU 3000.

The ONLY difference I can see is that these part numbers are in reference to a MRTI 2000 interconnecting cable for the ASTRO DIU 3000 in the first case (FKN 4389), and in the second case this cable (CDN 6021) is specified as a MRTI 2000 interconnection cable for an ASTRO/DIU.

Xmo had kindly previously noted to me that the "ASTRO DIU 3000" and "ASTRO/DIU" are the SAME, except that the present ASTRO DIU 3000 is packaged to fit in a rack or cabinet, whereas the previous ASTRO/DIU was a desk top unit housed in a plastic case, very similar in appearance to the T5600 tone remote desk console unit. The ASTRO DIU 3000 has replaced the discontinued ASTRO/DIU.

Is it possible that Motorola changed the MRTI interface cable connector on the ASTRO/DIU vs. the ASTRO DIU 3000 unit? I notice that the RSS for these two units is the same. I was under the impression that the circuit boards are the same, and thus the connectors, and it seems hard to believe that they would change the connectors.

Please enlighten, and Thanks!

Larry

BrentLA · Post by **BrentLA** » Tue Nov 19, 2002 7:02 am

Motorola with a price conflict? Say it isn't so

ASTROMODAT · Post by **ASTROMODAT** » Tue Nov 19, 2002 5:10 pm

Not worried about price conflict. I just need to order the correct cable.

Larry

Astro Spectra · Post by **Astro Spectra** » Mon Nov 25, 2002 11:08 am

The MRTI interface port connector on the DIU is an 8-pin modular socket and it is the same on the two DIU versions you mentioned.

The interface on the back of the MRTI 2000 box is an 16-pin cable header.

According to the DIU manual the FKN 4389 MRTI cable is just a 9-pin D type to modular plug, something you can build with $10 of parts from Fry's. If you want further info I can post the FKN 4389 cable pin out.

Using the cable shown in the DIU manual must mean that either the MRTI 2000 ships with a suitable 16-pin header to 9-pin D cable or that the manual actually refers to the MRTI 1000 interface.

If you find another cable listed, perhaps it is a single 8-pin modular to 16-pin header without the intermediate D types?

I've only worked with the MRTI 2000 connected to a 25-pin D so I've not seen the exact cable combo you need.

By the way if anyone has the full pin-out info for the MRTI2000 header it would be apprciated.

Cheers, John

ASTROMODAT · Post by **ASTROMODAT** » Mon Nov 25, 2002 6:18 pm

Astro Spectra, what about the CDN-6021? Perhaps this connects from the MRTI 2000 16 pin Molex connector to the DIU 3000? This is the cable part number called out in the MRTI 2000 section of the price book to coonnect to a DIU 3000.

Don't know which one is correct, but obviously the FKN cable was either outright wrong, or at best, an interim cable. The later makes little sense becasue I would thinkl if you are going to go to the trouble to make a custom cable, you'd make it with one cable and an appropriate connector at each end, as opposed to two cables and 4 connectors.

Larry

Astro Spectra · Post by **Astro Spectra** » Tue Jan 13, 2004 7:29 pm

Just for the sake of completeness, here is the MRTI 2000 pinout:

1 PL Strip
2 PL Strip Return
3 Monitor
4 Monitor Return
5 PTT
6 PTT Sense
7 Data TX (TPL and DPL signal output)
8 TX Audio
9 TX Audio Return
10 RX Audio
11 RX Audio Return
12 PL Detect
13 Carrier Detect
14 Optional Input #1
15 Patch Inhibit
16 Optional Input #2

ASTROMODAT · Post by **ASTROMODAT** » Tue Jan 13, 2004 7:39 pm

Wow, I forgot about this ancient post! I had long ago got the correct cable. It turns out that there are 2 cables needed. One goes from the DIU to a juction connector, that in turn goes to the MRTI. Also, there is a mistake in the MRTI and DIU manual where they reversed the leads. We found this out when first wired it up. Since then, we have replaced the MRTI 2000 with the SCOM 7K controller, albeit any good controller will work fine. We like the digital audio board (DAB) in the "somewhat new" SCOM 7K. It stores WAVs on an MMC card, up to 16 bit at 22 kHz, so the audio is absolutely nice and clear. When a mobile keys up in analog versus IMBE, the DIU will send out the voice announcements in analog versus IMBE, automatically, since we have it set for Mode Slaved operation. Same thing with encryption---it all works automatically, as we have everything Mode Slaved on the DIU3000 via the MRTI Port on the back of the DIU.

Larry