User`s guide

180 DC 900-1340I

BSC Programmer’s Guide

When an RVI is received during transmission of a message, the BSC 2780/3780 software

indicates the successful transmission of a data block by setting the

dlRead

pOptArgs.usProtCommand

field to DLI_PROT_RESP_LOCAL_ACK, and the dlRead

pOptArgs.iICPStatus

field to DLI_ICP_ERR_RVI_GOOD_RECV in the following two cases:

1. a data block is acknowledged by an RVI (when the continue option is selected)

2. an ETX block is acknowledged by an RVI (when either continue or abort is

selected).

To set this option using the DLI configuration file, use the rviHandling parameter; for

example,

rviHandling = “continue”. See Table 7–2 on page 191.

Caution

The client sends a priority message to the BSC 2780/3780 software

using the priority data codes

(DLI_PROT_SEND_PRIOR_DATA and

DLI_PROT_SEND_PRIOR_DATA_EOM); however, the BSC 2780/3780 soft-

ware receives priority messages as normal data

(DLI_PROT_SEND_NORM_DATA and DLI_PROT_SEND_NORM_DATA_EOM).

The client’s only indication of an incoming priority message is the

RVI code in the

dlRead pOptArgs.iICPStatus field

(DLI_ICP_ERR_RVI_GOOD_RECV or DLI_ICP_ERR_RVI_RCV_ABORTED).

6.26 DSR/DCD Delay Option (30)

This option determines the delay in seconds between the time BSC detects a loss of the

data set ready (DSR) or the data carrier detect (DCD) modem signal (depending on the

setting of the modem control option, Section 6.15) and the time this loss is reported to

the client application program. This option is designed for use in systems where

momentary losses of the DSR/DCD signal are common.

When the BSC software detects a loss of the DSR/DCD signal, it delays for the specified

number of seconds before reporting the loss with the