User`s guide

AT Command Set and S-Registers
13-233980-A2-GB30-40 October 1998
Table 13-2
(6 of 15)
3800
Plus S-Registers
AT Command Front Panel BranchDescription
S37 DTR Auto Redial
DTR Auto Redial allows repeated automatic dial backup attempts by
specifying the range of Directory Locations that can be tried. A redial
attempt is made in response to a bad phone number, a busy signal, no
answer, or no quiet answer. The modem must be in Originate mode.
When DTE Dialer Type is DTR=Dirs, DTR Auto Redial (S37) works in
conjunction with the DTR Cont Repeat (S38) configuration option. A redial
attempt is made in response to a low to high transition of DTR.
Register has the following values:
0= Directory Location 1
1= Directory Locations 1–2
2= Directory Locations 1–3
3= Directory Locations 1–4
S S
S S
9= Directory Locations 1–10
NOTE: The modem must be in Originate mode to perform an automatic
dial backup.
Configure\Edit\
Line_Dialer
S38 DTR Cont Repeat
Determines whether automatic dialing of dial backup directory locations
will be repeated continuously, or halted after the first pass.
Regardless of the setting of S38, dialing is locked out after ten failed
attempts to connect to the same number.
Register has the following values:
0=Disable
1=Enable
Factory setting is Disable.
Configure\Edit\
DTE_Dialer
S39 Receive Buffer Disconnect Delay
Determines the maximum amount of time the modem can continue to send
data in its Receive Buffer to the DTE after the modem is commanded by
the DTE to disconnect, or after the modem detects a line disconnect.
Register has the following values:
0=Disable (Immediate disconnect)
1=1 second
2=2 seconds
S S
S S
255=255 seconds
Factory setting is Disable (0).
Configure\Edit\
V42/MNP/Buffer
S40 Auto Make Busy
Register determines if the modem goes off-hook under certain conditions.
This register should only be enabled when the modem is located behind a
user’s Private Branch Exchange (PBX).
Register has the following values:
0=Disable
1=Enable
Factory setting is Disable.
Configure\Edit\
Line Dialer