Multi-Tech Systems ISIHP-2U - Manual (Page 99)

MultiModemISI Hybrid Series, ISIHP-2S/2U/4S/4U/4SD 99
Modem AT Commands & S-Registers
Range: 0-1
Default: 1 (enabled)
Used for testing and debugging only. Enables and disables V.32bis start-up
auto mode operation. Set S43 to zero (0) to disable start-up auto mode, or 1
(the default) to enable start-up auto mode.
S89 Off-line Time
Unit: 1 second
Range: 0, 5-255
Default: 0
Sets the length of time, in seconds, a modem waits in the off-line command
mode before it goes into standby mode. If S89 is set to 20 seconds, the
modem waits 20 seconds in off-line command mode before going into
standby mode. Setting S89 to zero (0) prevents the modem from ever
entering standby mode.
Setting S89 to any value between zero and five (1-4) effectively sets the
value to five, because five seconds is the minimum possible wait time.
S108 Line Code Control
Unit: Decimal
Range: 0, 1
Default: 1
Controls the line coding used by the modem.
S108 = 0 mu-law
S108 = 1 A-law (default)
S109 PCM Mode Control
Unit: Decimal
Range: 0–2
Default: 1
Controls the PCM ( pulse code modulation) mode (V.90 or K56Flex).
Determines which mode the modem will answer in for PCM connections.
S109 = 0 K56Flex support only
S109 = 1 Both V.90 and K56Flex supported
S109 = 2 V.90 support only