Clear-Com MS-704 - Manual (Page 28)

M S - 7 0 4 / R M - 7 0 4 F O U R - C H A N N E L M A I N / R E M O T E S T A T I O N S 2 - 1 2
INTERNAL OPTION JUMPERS
There are several jumper options inside the chassis of the MS-704 and RM-704.
CAUTION: Remove AC power from the unit before removing the top cover.
The following options are available:
• IFB operation mode select
• Run/test mode jumper
• Program audio feed to announce output
IFB Mode
The MS-704 and RM-704 support two different modes of operation for the
internally generated IFB function. J10 on the main PC board (in the lower left
hand corner of the board just behind the DIP switches) selects this mode. If an
interrupt enable DIP switch is enabled for a channel, the operation will be as
follows:
• LOCAL (Talk Function Activated): Jumper between Pins #1 and #2, factory
default. When a talk is active on the channel on which the interrupt has been
enabled, the program will be interrupted for the duration of the talk.
• REMOTE (Call Signal Activated): Jumper between pins #2 and #3. When a
call is received on the channel on which the interrupt has been enabled, the
program will be interrupted for the duration of the call signal on that
channel. To cause an interrupt of the program from this station a call signal
must be sent by pressing the call button or enabling the auto-call DIP switch
option for that channel and activating a talk on that channel.
Run/Test Mode Jumper
The J2, J12, P3, and P4 jumpers on the main printed circuit board allow a
factory test mode to be invoked and should never be used for normal intercom
operation.
CAUTION: Do not move these jumpers. Moving these test jumpers may cause the
MS-704 and RM-704 not to operate. Possible damage to the product
may result.
Program Audio Feed to Announce Output Jumper
J11 on the main board allows program audio to be fed to the announce output.
This is selected by setting jumper J11 to the on position. In this mode, pressing
the announce pushbutton turns off the program audio feed to the announce
output and replaces it with audio from the selected panel or headset microphone.
The factory default position for J11 is in the off position, blocking program
audio feed from the announce output.