16 Installation and Operation
TIF-2000A
Fast Seize
Switch 6 enables/disables the Fast Seize feature. If the switch is in the off position, Fast Seize is disabled. If the switch is in the on
position, Fast Seize is enabled. If Fast Seize is enabled and the unit is set to auto-answer, then the TIF2000A answers or seize the
line at the start of the first ring. It is important to note a ring is not heard on any of the keypanels.
DSP Full or Half Duplex Selection
Switch 7 determines either full-duplex or half-duplex operation. If the switch is set to the off (factory default) position, the DSP is
forced into full-duplex mode as determined by the setting of switch 8 on the DIP switch bank located on the rear panel of the
TIF2000A. If the switch is set to the on position, the DSP is never forced into full-duplex mode.
Audio Ducking
Switch 8 enables/disables the Audio Ducking feature. If the switch is set to the off position, audio ducking is disabled. If the switch
is set to the on position, audio ducking is enabled. The audio ducking feature helps to eliminate feedback between the intercom
system and the telephone.
Internal DIP Switch (S203)
Internal DIP Switch (S203) selects the password and call progress IC type. Switch 6 must be set to match the type of Call Progress
IC installed in the unit at location U204. The switch is preset at the factory in the Open position if the IC installed at location U204
is a M-985-01 or in the Closed position, if an M-982-02 is installed at location U204. Switch 6 is also part of the password, if a
password is required. When password required is enabled, the password must be entered via DTMF by the caller before they may
communicate. This is to prevent unauthorized use of the intercom by callers. See Table 4 on page 16 and Table 5 on page 18.
Switches 7 and 8 select the length of the password, from 1 to 4 digits long. If set for 1 digit, only the first digit of the password is
used, if set for 2 digits, then the first 2 digits are used, etc.
TABLE 4.
Password Configuration
PW Length
SW7
SW8
4
off
off
3
on
off
2
off
on
1
on
on