Product manual

Software Configuration Program

Note

The COR/VOX LED can be used to track the current state of the

COR input to the Model 26 (J13-pin 5); however, you must

always remember that the LED being lit only means that the

input has been pulled low. If option 3 in the Communication

Mode menu is selected, then TX is Enabled while the LED is lit. If

option 4 in the same menu is selected, then TX is Enabled when

the LED is

not lit

Wire Line Communication Mode

This communication mode is specifically designed for a wire line communication

interface. A “wire line” interface for the purposes of Model 6/26 communications means:

• a telephone company “dry pair” (600Ω line pair with no battery)

• a telephone company “dedicated” pair, (600Ω line pair with battery, but no

supervision, i.e. always active)

• a local twisted-pair or shielded-air interface directly connecting to all Model 6

units from the Model 26 panel(s).

The use of DOD, POTS, End-to-End, or Ground-Start trunks is not supported for the

Model 6/26 communications interface.

This dedicated interface operates the system in a fast continuous polling mode. In this

mode, the Model 26 assumes it has complete control of the communications channel and

when it wants to transmit it does not check first to see if the channel is busy.

If the Model 26 is operating in this mode then all of the Model 6s should be operating in

this mode too. When the Model 6s operate in this mode, they cannot transmit packets

unsolicited (without being polled). Thus they must be continuously fast polled so any

status changes that occur can be immediately reported.