User`s guide

6: BSC 2780/3780 Link Configuration Options
DC 900-1340I 159
6.1 Data Rate Option (1)
The data rate can be set by the client for installations where the communications server
must generate the data clocking signal. If external clocking is provided by a modem or
modem eliminator, the configuration of the data rate is not required. However, when
transmitting data, the BSC software uses the data rate setting to calculate the amount of
time to wait before aborting a transmission with the
DLI_ICP_ERR_XMIT_TIMEOUT transmit
timeout error. Therefore, if BSC is being used to transmit data, the data rate should be
set to match, or be slower than, the modem clock rate.
The data rate on a link can be set from 75 through 64,000 bits/second. When using data
rates above 19,200 bits/second, be careful not to overload the communications server
processor. Freeway supports up to 16 links per ICP. The maximum link data rates are:
• 2 links at 64,000 b/s
• 4 links at 38,000 b/s
• 8 links at 19,200 b/s
• 16 links for a 16-port ICP at 9600 b/s
To set this option using the DLI configuration file, use the dataRate parameter; for
example,
dataRate = 9600. See Table 7–2 on page 191.
6.2 Clock Source Option (2)
The clock source option determines the source of the data clock signals for a link. Data
clocking can be provided by the BSC software or received from an external source.
To set this option using the DLI configuration file, use the clockSource parameter; for
example,
clockSource = “external”. See Table 7–2 on page 191.