The customer complains he can't transmit any x.25 packet.
The sh x25 vc 1 command returns:
SVC 1, State: D1, Interface: Serial5/3
Started 01:05:08, last input 00:08:32, output 00:06:37
Connects xxxx <--> PAD
Window size input: 7, output: 7
Packet size input: 128, output: 128
PS: 5 PR: 5 ACK: 5 Remote PR: 6 RCNT: 0 RNR: FALSE
Window is closed
Retransmits: 0 Timer (secs): 0 Reassembly (bytes): 0
Held Fragments/Packets: 0/1
Bytes 370651/180381 Packets 3061/1757 Resets 0/0 RNRs 0/0 REJs 0/0 INTs 0/0
After reseting this svc with clear x25 vc 1, the customer can get to communicate.
"Held Fragments/Packets: 0/1" counter is increased and the message "Window is closed" appears in the show command.
What could it be?