Black Box MD1640A, MD1641A Carrier Detect Response Time, S10 Carrier Loss Disconnect Delay Time

CHAPTER 6: S-Registers

default setting is two seconds. S8 may be set for up to 255 seconds.

S8 also sets the time the modem waits before retrying a call after detecting a busy signal. Some computer systems need more than two seconds to reset (in which case you should increase the value of S8).

S9

Carrier Detect Response Time

Unit:	100-mSec intervals
Range:	1-255
Default:	6
Description:	S9 sets the time delay between when the modem
	first detects a valid incoming carrier signal and
	when the modem turns on its Carrier Detect
	circuit. The default setting is 600 milliseconds
	(six units of 100 mSec each). S9 may be set to a
	maximum of 255 (25.5 seconds).

S10

Carrier Loss Disconnect Delay Time

Unit:	100-mSec intervals
Range:	0-255
Default:	7
Description:	S10 sets the time a carrier signal must be lost
	before the modem disconnects. The default
	setting is 700 mSec (seven units of 100 mSec
	each). Maximum delay is 25.4 seconds (S10 set
	to 254). Setting the S10 value to 255 causes the
	modem to not disconnect with loss of carrier.
	(This S-Register applies at speeds of 2400 bps
	and less.)

95