Hardware Suggested and Used

The hardware used in this project consists of:

Motorola Quantar/Quantro for frequencies of interest (VHF/UHF/800) - (receiver and/or transmitter site)

Motorola OEM or aftermarket V.24 card, set for EXTERNAL Clocking

Motorola AstroTAC receiver unit for frequencies of interest (receive-only site and V.24 built-in already)

Cisco router capable of running Advanced Enterprise IOS (we use 1841 or 2651XM surplus units with 12.4 IOS)

Cisco WIC-1T Serial Interface Module installed in router selected

Cisco CAB-232FC DB-60 to DB-25 female cable - for WIC-1T (optionally you can use other multiple Serial port cards with matching cables)

Homemade CAT-5 to DB-25 male cable to connect Motorola gear to the Cisco gear (see diagram provided)

Program the Motorola ASTRO25 gear as follows (Wireline Interface can be V.24 HYBRID or V.24 ONLY):

This setup tell the Motorola gear to use the V.24 interface to communicate to the outside world, using an EXTERNAL TRANSMIT clock. This is important since sync with the MQB server across the internet is needed, versus a local "in-room" cross-over connection. Since we're working with syncronous timed data, you'll understand why we need to wait for incoming data to keep pace in communications.

The "RT/RT Configuration" is required to configure the station for full-duplex, remotely controlled operation. If disabled the system will not work.

More to come...