Centracom Gold Elite BIM Question

[mhoeft]

Does a BIM know, through programming or DIP switches, whether it is used in 2-wire or 4-wire configuration?
All of our current BIMs are 2-wire to tone remotes; I now have to re-use a BIM for another radio and it calls for 4-wire interface.....
Do I need to reprogram the BIM or reconfigure some DIP switches, or doesn't it matter?
Thanks
Mike

[d119]

Doesn't matter. The BIM will receive on either pair, but only transmits on one pair.

It's how you punch it down.

One pair is TX/RX, the other pair is RX only. For 2-wire, punch to the TX/RX pair. For 4-wire punch TX to the TX/RX pair, RX to the RX pair.

[RFguy]

We have manual transfer swtches to switch between main and back-up radios. The main is 4-wire, the back-up is 2- wire.

The BIM doesn't care what pair it RX's on, as D119 says, long as the TX pair is correct in the 4-wire

[Rod Farva]

Each Bim has 4wire capablity as mentioned but also has logging, each slot in the card cage has a specific row on the punch block, there is a punch block road map in the centracom CEB manual. Each slot in the card cage will give you 3 rows on the punch block, 2w 4w and logging...

[desperado]

The pairs that you punch on are dependent on what slot you are in. The statement of 2 wire / 4 wire / logging is correct.
However, I am not 100% certain that you don't need to re jumper the BIM.

You can have a couple different configurations
2 wire
4 wire half duplex
4 wire full duplex

Full duplex allows you to connect a radio that generates a connect tone or has a side tone on key for a wait on MDC or other signaling.
IT also allows for talk permit tone, unsecure tone and the like.
If you are configured this way, it will create a feedback loop and howl at you.

Those jumpers are JU14 JU25 and JU26

Let me know if you need the specifics.