IBM SC30-3681-08 manual Disconnect-timeout # of seconds, Hdlc encoding

V.25bis Con®guration Commands

takes to establish connections to various destinations. You can then set this parameter to a number slightly higher than the longest connect time.

Note: Normally government regulation limits modem manufacturers to a maximum length for call setup. This value is merely an optimization, although inter-operation with some DSUs may require that you change this parameter.

disconnect-timeout # of seconds

Speci®es the amount of time, in seconds, that the router waits after dropping DTR before it initiates further calls. The range is 0 to 65535 seconds, and the default is 2. If you set this parameter to 0, the router waits for the modem to respond to the DTR drop by dropping CTS and DSR before it initiates the next call.

duplex

Speci®es the duplex type of the line.

When full-duplex is con®gured, the RTS modem signal remains asserted once the dial connection has been established.

When half-duplex is con®gured, the router raises RTS when it is time to transmit and waits for CTS to be asserted by the modem. After CTS is asserted, the router transmits data packets and then drops RTS when the router is through transmitting to let the peer device respond.

Only con®gure half-duplex when using the V.25bis interface to handle switched SDLC and the attached modem requires the half-duplex mode of operation.

Note: Duplex must be full for PPP or Frame Relay circuits.

Valid values: full or half

Default value: full

hdlc cable rs232 dte

Speci®es the type of cable connected to this interface. Setting this parameter allows you to view the cable type when you enter the interface

command at the GWCON (+) prompt and when you enter the statistics command at the V.25bis> monitoring prompt. This parameter does not

affect operation of the router.

hdlc encoding

Sets the HDLC transmission encoding scheme as NRZ (non-return to zero) or NRZI (non-return to zero inverted). Most con®gurations use NRZ. The con®gured encoding is used for the end-to-end connection.

Note: Although you might con®gure NRZI, the exchange between the DTE and the modem (as described by CCITT recommendation, V.25bis) uses NRZ as the encoding scheme.

Valid values: NRZ or NRZI

Default value: NRZ

hdlc speed

Speci®es the line speed for this interface. Setting this parameter allows you to view the line speed when you enter the interface command at the

586MRS V3.2 Software User's Guide