Digicom 3910, 3911 operation manual 14-25

AT Command Set and S-Registers

Table 14-3

(11 of 13)

391x Series S-Registers

S-Register		Description	DCP LCD
			Command
			Sequence
S89	V.42 Automatic Request for Retransmission (ARQ) Window Size
	Increase. Register allows the ARQ window size to be set to a value
	from six frames to fifteen frames.
	For best performance, this register should remain at its default setting
	of six frames (ATS89 = 0). The only reason to change it is for satellite
	delays.
	Register has the following values:
	0	= six frames
	1	= seven frames
	2	= eight frames
	3	= nine frames
	4	= ten frames
	5	= eleven frames
	6	= twelve frames
	7	= thirteen frames
	8	= fourteen frames
	9	= fifteen frames
	The factory setting is 0 (six frames).
	This command only applies when the modem connects using V.42bis
	data compression or V.42 error control. If the modem is configured for
	Direct mode, MNP mode, Buffer mode, or Synchronous operation, this
	command is invalid.
	This command does not have a front panel equivalent.
S90	DTE Rate = VF. Register allows the DTE’s data rate to be equal to the		Configure\Edit\
	VF (telephone line) data rate. If Enabled, the data rate between the		DTE Interface
	DTE and modem is the same as the modem’s VF data rate. As a
	result, when the modem is in Data mode, the speed of the data
	passed between the modem and DTE occurs at the VF data rate.
	Register has the following values:
	0	= Disable
	1	= Enable
	The factory setting is Disable.
S92	V.29 Train On Data. When enabled, the modem receiver can train		Configure\Edit\
	based upon the incoming data or a training sequence from the distant		Leased
	modem. This function is necessary for a remote (tributary) modem in a
	V.29 multipoint network and is recommended for a control modem as
	well.
	Register has the following values:
	0	= Disable
	1	= Enable
	The factory setting is Disable.

3910-A2-GN32-40 September 1998 14-25