Paradyne COMSPHERE 3920PLUS Series, Technical Reference Manual

Page: 92 / 356

Configure Branch
5-15 3920-A2-GH30-40 October 1998
Table 5-1
(6 of 9)
DTE Interface Configuration Options — Multiport Mode
l
DSR Control: Stndrd_RS232
Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR On_Early Delay_ToData
Data Set Ready Control. DSR is a signal from the modem to the DTE indicating the modem is connected and ready for
operation.
Standard RS232 – Allows the modem to control DSR to the DTE. The modem raises DSR when it begins the
handshake process. DSR lowers upon disconnect. The modem is not ready to receive data until DSR, CTS, and LSD
are active. An ON state indicates to the DTE that the modem is ready to receive data. An OFF state indicates that the
modem is not ready to receive data, and the DTE will not send data to the modem. During a Local Analog Loop and a
Remote Digital Loop, DSR is ON.
Forced On – Forces DSR output ON constantly. This is usually used for leased-line applications and when the DTE
requires DSR to always be ON.
Wink When Disconnect – DSR is normally forced ON, but is turned OFF for 1 to 2 seconds upon a disconnect.
Follows DTR – When the modem receives DTR from the DTE, it sends DSR to the DTE.
On Early – DSR is low when the modem is in the idle state. DSR goes high immediately upon a command to enter Data
mode. This setting is required for some modem pooling applications.
Delay to Data – Operation is similar to the Standard RS232 except that DSR does not turn ON until the modem enters
Data mode. Normally, the modem raises DSR when it begins the handshaking process. Use this setting when the DTE
cannot operate with a long DSR-to-CTS delay (common for V.32bis modulation).
RTS Action: Stndrd_RS232
Nxt Stndrd_RS232 Ignore Sim_Cntl_Car
Request-to-Send Action. RTS is a signal from the DTE indicating the DTE has data to send.
Standard RS232 – Allows the DTE to control RTS to the modem in normal EIA-232-D operation. RTS must be ON for
the DTE to transmit to the modem.
Ignore – Modem assumes RTS is always ON. Use this selection when the DTE does not provide RTS to the modem.
Simulated Control Carrier – RTS input controls the remote modem’s LSD signal. This is used for DTEs that require
Line Signal Detect (LSD) to toggle ON and OFF to simulate half-duplex operation. If RTS Action is set to simulated
control carrier, then the remote modem’s LSD Control configuration option must be set to Simulated Control Carrier.
Simulated Control Carrier conforms to V.13 specifications. This setting is ignored when the modem is configured for
Asynchronous mode and RTS/CTS flow control is selected.
NOTE: Simulated Control Carrier is not available on point-to-point MSD ports.
NOTE: Simulated Control Carrier is available on TMp tributary ports for dial backup purposes.
RTS Antistream: Disable
Nxt 10msec 30msec 1min 2min 3min 5min
This configuration option only appears when MSD is enabled, or when RTS Action is set to Sim_Cntl_Car.
Request-to-Send Antistreaming. If enabled, the operation of the antistreaming function is as follows. If RTS is ON for a
period exceeding the selected time, the modem will take over control of the carrier and will force the carrier OFF. The
modem will also force CTS OFF during this time. This condition will stay in effect until the DTE turns RTS OFF. After
this, the next time the DTE turns RTS ON, carrier will be turned ON and the RTS timer will start again.
Disable – The antistreaming function is not in effect.
10 sec, 30 sec, 1 min, 2 min, 3 min, 5 min – Enables the antistreaming function and sets the maximum ON time for
RTS before antistreaming control takes effect.