COMSPHERE 392xPlus Modems
4-62
November 1996
3920-A2-GN31-30
Table 4-12
(5 of 6)
V.42/MNP/Buffer Configuration Options — Singleport Mode
A
Send Break Cntl: Data_First
End Data_First Break_First
This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control
Mode is
not configured for DirectMode.
Send Break Control. Determines what is sent from the modem first, data or break if a break sequence is sent from the
DTE.
Data First (Nonexpedited) – A break is treated as a data character and is sent in the order it was received. This is also
known as Nonexpedited mode.
Break First (Expedited) – A break is sent before the data currently in the buffer. This is also known as Expedited mode.
NOTE: This configuration option is ignored if the Break Forces Escape configuration option (refer to the DTE Dialer
configuration options group) is enabled.
The AT commands for Break First are \K0, \K1, \K2, and \K3.
The AT commands for Data First are \K4 and \K5.
BuffrDiscDelay: 10sec
Nxt 10sec Disable 60sec
This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control
Mode is
not configured for DirectMode.
Buffer Disconnect Delay. Determines how long the modem continues to transmit data stored in its buffers when the
modem is commanded to disconnect by a locally attached DTE. This also applies to the modem’s receiving buffers
when it is commanded to disconnect from a remote modem or DTE.
Disable – Modem disconnects immediately without attempting to send data stored in its buffers.
10, 60 sec – Maximum amount of time the modem tries to empty its buffers before disconnecting. In both cases (10 sec
and 60 sec), the modem disconnects much sooner if it can empty its buffers.
NOTE: This configuration option is not available if Error Control Mode configuration option is set to Direct Mode.
The AT command is S-Register S49=
n, where n is 0 for Disable and any value from 1 to 255 in 1 second increments.
Max Frame Size: 256
Nxt 256 192 128 64 32 16
This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control
Mode is
not configured for BufferMode or DirectMode.
Maximum Frame Size. Sets the maximum frame size for V.42 and MNP. For V.42 operation, 128 is the maximum value.
Any value which exceeds this will automatically default to 128 for V.42. For MNP operation, 64 is the minimum value.
Any value less than that will automatically default to 64. For cellular applications, at least one of the sides should be set
to a low value. A setting of 32 is recommended. Only one modem needs this setting; both modems will automatically
default to the greatest common value.
The AT Command for 256 is \A3.
The AT Command for 192 is \A2.
The AT Command for 128 is \A1.
The AT Command for 64 is \A0.
The AT Command for 32 is \A4.
The AT Command for 16 is \A5.
