Motorola 3260FAST User Manual page 119

326X Series Modem Troubleshooting Guide (Continued)
Problem Diagnosis/Test
Check whether modem is set for
Flow=Tx Clk (AT
Check if TpDlyMin=Rx Clk
(AT
If both modems are 326X-SDC,
check to ensure option sets are
the same in both modems.
Check if one of your modems
(local or remote) is a 326X-SDC
unit.
Poor throughput Check your applications proto-
performance col:
Check whether TpDlyMin=Off
(AT
lyMin=RxD Dly (AT
Check if modem is set for
Flow=Off (AT
If performance is not satisfac-
tory, experiment with frame and
window sizes.
If link utilization is low
(as shown in the front panel
throughput and link utilization
status display)...
Poor throughput delay Check the setting of the flow
control option.
6-8 Troubleshooting Guide
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
* FL5).
*
TD1).
• If a window size of one is
used (half duplex proto-
col)...
• If using Novell IPX...
* TD0) or TpD-
*
TD2).
* FL0).
Possible Solution
If your DTE cannot handle Tx clock stopping, set
Flow=Off (AT * FL0) or use CTS flow control.
If your DTE equipment cannot handle Rx clock stopping,
*
set TpDlyMin=Off (AT TD0) or set TpDlyMin=RxD
*
Dly (AT TD2).
If the option sets are not the same, select the same option
sets in both modems using Select Options (ATZ) com-
mand.
If the local or remote modem is a 326X-SDC modem, set
*
Fast Call=Off (AT FC0) in it.
Increase window size.
Ensure burst mode is selected.
If your DTE can handle Rx clock stopping, set
TpDlyMin=Rx Clk.
If your DTE can handle Tx clock stopping, set Flow=Tx
Clk (AT * FL5). If it does not support Tx clock stopping,
use CTS.
The optimum frame size for most applications is between
128 and 1024 bytes.
The optimum window size for most applications is 7 to 4.
Increase the DTE rate.
Use Tx clock or CTS for flow control and Rx clock for
throughput minimization delay.