Bit Switch 07
FUNCTION
COMMENTS
0
Back to back test
0: Disabled
1: Enabled
Set this bit to 1 when you wish to do a back -
to-back test. Note that this machine has
jumpers on the NCU for supplying line
voltage during a back-to-back test.
1
Short preamble
0: Enabled 1: Disabled
If this is 0, the Short Preamble feature is
switched on.
2
Not used
Do not change the factory setting.
3
Echo countermeasure
0: Enabled
1: Disabled
If the setting is 1, the machine will hang up if
it receives the same signal twice. If the
setting is 0, the machine will ignore echoes
from the line.
4
DIS detection number
0: 1
1: 2
The machine will send DCS (G3 set-up
signal) if it receives DIS. If echoes are
frequent, setting this bit to 1 will allow the
machine to wait for the second DIS before
sending DCS.
5
ECM
0: On 1: Off
If this is 0, ECM is switched on.
6
Post-message response timing (rx)
0: After feed-out
1: When the leading edge reaches the
printer jam sensor
0: Data cannot be stored in the SAF during
reception if the memory is full, so, if this bit is
0, the machine will wait until the page has
been fed out. However, communication will
take longer to complete.
1: The post message response is sent earlier,
but the paper has not been fed out yet, so if
there is a jam after this, data may be lost.
This bit is ignored during memory reception.
7
Not used
Do not change the factory setting.
Bit Switch 08 (Transmission)
FUNCTION
COMMENTS
0
1
2
Initial Tx modem rate
Bit 2 Bit 1 Bit 0 Setting
0 1 1 9,600 bps
0 1 0 7,200 bps
0 0 1 4,800 bps
0 0 0 2,400 bps
Other settings: Not used
These bits set the initial starting modem
rate for transmission. This rate may fall
back to a slower rate depending on line
conditions and the remote terminal’s
capabilities.
3
Not used
Do not change the factory settings.
4
5
6
7
November 30th, 1991
SERVICE TABLES AND PROCEDURES
BIT SWITCHES
4-16
Summary of Contents for FAX500
Page 1: ...FAX550 SERVICE MANUAL...
