7845C in conjunction with a DSC 5020

["Ratchet442" <ratchet442@xxxxxxxxxxxxx>]

Seen this once a long time ago in a mini-mart. The mini-mart had a DSC 5020
and a Alarmnet 7845C tied into it, but at the time I was unable to locate
where in the mini-mart the 7845C was located to verify how it was wired.
When I sent some signals, I expected to be told by monitoring that they
recieved a signal from the panel in CID ie:(Zone 4). I then expected to get
a typical Zone 1 Burg Alarm off of the 7845C. What I got was a (Zone 4) off
of the 7845C. I then questioned how they got a (Zone 4). It seems that both
the panel and the 7845C were setup using the same alarm event template.
Which tells me, that the 7845C was setup with some type of communications
between the 5020 and 7845C. And was not wired in the traditional method of
(panel output-to-radio input). I assume this was done using a street smart
module. Anyone got an idea how this may have been wired in order for the
7845C to understand the system events enough to report CID. Thanks, Ratchet!