Paradyne 3800PLUS manual of DTE Interface Configuration Options, DTR Action Ignore

Configure Branch

Table 8-1

(3 of 7)

DTE Interface Configuration Options

DTR Action: Ignore

Nxt Stndrd_RS232 Ignore CntrlsOnHook Off=ReloadStrp Off=CmdMode

Data Terminal Ready Action. DTR is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation.

Standard RS232 ± Allows the DTE to control DTR to the modem as specified in RS-232D and CCITT V.24 specifications. If this signal is not present, the modem will not answer or dial.

Ignore ± Modem assumes DTR is always ON. This is used when DTE does not provide DTR to the modem.

CntrlsOnHook ± Modem does not disconnect from the VF line during an active call until DTR is lowered by the attached DTE. This setting is required for applications in which the host processor must reset itself for the next session before the current session is terminated. The setting is ignored if the modem receives a disconnect command from the DCP or from the COMSPHERE 6700 Series NMS.

Off=ReloadStrp ± Like Standard RS232, except that when DTR is lowered the modem loads the Active (Saved) area into the Active (Operating) area.

Off=CmdMode ± When the modem is online and DTR is Off for longer than the period specified by the S25 register, the modem enters online Command mode. The ATO command must be issued to return to data mode. This setting has the same effect as Ignore if AT commands are disabled.

NOTE: If V.25bis mode is used, then this configuration option must be set for Stndrd_RS232. The DTE must provide DTR to dial or answer a call.

When operating over the dial network, this selection forces DTR Action to behave as CT108/2 (Data Terminal Ready). If DTE Dialer Type configuration option is set to DTR=Direct 1, then DTR Action behaves as CT108/1 (Connect Data Set to Line).

For Async Dial, Sync Leased, and UNIX Dial, Ignore is the factory default.

For Sync Dial, Stndrd_RS232 is the factory default.

AT command equivalent is &Dn.

3980-A2-GB30-20 November 1996 8-9