Troubleshooting guide:

Data Transfer Problems

Data Transfer

Troubleshooting Windows Data Transfer Problems
Problem Symptom	Possible Cause(s)	Action
During data transfer, RR poll frames are transmitted, and eventually the link resets.	T1 too short.	Reconfigure the T1 timeout period to a longer value: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Level 2 tab, and increase the size of the Retransmission Timeout (T1) parameter.
An X.25 Reset Request packet is sent with diagnostic code 0x01.	The layer 3 default receive window size configuration is incorrect (too small).	Reconfigure the layer 3 receive window size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Rx Window Size parameter.
An X.25 Reset Indication packet is received with diagnostic code 0x01.	The layer 3 default transmit window size configuration is incorrect (too large).	Reconfigure the layer 3 transmit window size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Tx Window Size parameter.
When receiving bulk data (for example, when connected to a data feed service), data transfer is slower than is expected.	The FarSync X.25 is not acknowledging each receive data packet individually. (Note: the FarSync software is optimized for full-duplex data transfer.)	Reconfigure the layer 3 acknowledgment timer to zero: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Advanced Level 3 tab, change Acknowledgement Timer parameter to zero.
	The layer 3 default receive window size configuration is incorrect (too large).	Reconfigure the layer 3 transmit window size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Rx Window Size parameter. Caution: if you decrease the window size too much, you may get a different problem (see above).
When transmitting, bulk data transfer is slower than is expected.	The layer 3 default transmit window size configuration is incorrect (too small).	Reconfigure the layer 3 transmit window size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Tx Window Size parameter. Caution: if you increase the window size too much, you may get a different problem (see above).
An X.25 Reset Request packet is sent with diagnostic code 0x27.	The layer 3 default receive packet size configuration is incorrect (too small).	Reconfigure the layer 3 receive packet size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Rx Packet Size parameter.
An X.25 Reset Indication packet is received with diagnostic code 0x27.	The layer 3 default transmit packet size configuration is incorrect (too large).	Reconfigure the layer 3 transmit packet size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Tx Packet Size parameter.
During data transfer, a FRMR frame with the Y-bit set is sent (resulting in the link being restarted and the call being cleared).	The layer 3 default receive packet size configuration is incorrect (too small).	Reconfigure the layer 3 receive packet size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Rx Packet Size parameter.
During data transfer, a FRMR frame with the Y-bit set is received (resulting in the link being restarted and the call being cleared).	The layer 3 default transmit packet size configuration is incorrect (too large).	Reconfigure the layer 3 transmit packet size: Run the FarSync Configuration Program, select the line, and click on the Properties button, then click on the Basic Level 3 tab, change Default Tx Packet Size parameter.