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S11
DTMF Tone Duration
Unit Value: milliseconds
This object defines the timing of transmitted DTMF digits. The value is the digit pulse width (on time) and inter-
digit pause (off time) in milliseconds. The width and pause time cannot be defined independently.
S17
Error Correction Negotiation Timeout
Unit Value: 100 milliseconds Default: 150 Min: 0 Max: 255
This register defines how long, in units of 100ms, the modem will continue negotiation of an error control
protocol. If the LAPM negotiation has not been completed within the specified time, the fallback action
specified by S register 36, Error Correction LAPM Failure control, is taken. If a retrain occurs during this
interval, the timer is restarted.
S19
Error Correction Retransmission Limit
Default: 12 Min: 0 Max: 255
This register controls the number of times that the modem will retransmit the same frame before disconnecting
the link. When the modem is connected via V.90 modulation, the modem will attempt a retrain to the next lower
V.90 speed rather than disconnecting. If the retrain is successful the connection will continue. Should a V.90
connection retrain to a V.34 modulation, the connection will continue as a V.34 connection. If the retransmit
limit is reached while connected at a V.34 modulation, the modem will disconnect. A retransmit limit of 0 is
used to denote no limit, indicating that a disconnect will not result regardless of the number of times a frame is
retransmitted.
S20
Error Correction Maximum Frame Length
Default: 256 Min: 32 Max: 1024
This register limits the maximum frame length that will be offered during negotiation of an error control protocol.
The modem may apply a smaller limit due to internal buffer space limitations and the final, effective frame
length will, of course, be negotiated with the peer. The minimum packet size that can be negotiated is 32.
S23
LAPM Enabled in Originate Mode
Default: 1 Min: 0 Max: 1
This register controls whether the LAPM error control protocol is enabled in the originate mode.
If the value is 1, LAPM is enabled when originating a call. LAPM link requests will be sent (initiated) by the
MA30120 modem, in accordance with S17 and S36.
If the value is 0, LAPM is disabled in the originate mode.
In the answer mode, LAPM cannot be disabled. The MA30120 modem will always look for LAPM link
Note:
requests in accordance with S50.
MultiAccess Communications Server MA30120 User Guide
Default: 70 Min: 50 Max: 255
Appendix B – Modem Commands
149
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