ACC X.25 Protocol User's Guide

Appendix A 137
X.25 Status and Completion Messages
Unsolicited Status Messages
ST25BADPS (93) BadP(S)inreceivedpacket.Thisindicatesthata
data packet received on a VC contained an invalid
sequence number in the P(S) field. This will cause the
VC to be reset.
ST25BADPR (94) BadP(R)inreceivedpacket.Thisindicatesthata
data packet received on a VC contained an invalid
sequence number in the P(R) field. This will cause the
VC to be reset.
ST25RXREJ (95) The VC received a REJECT packet. This will cause
theVCtobereset.
ST25LCCTO (96) A Virtual Circuit control timeout has occurred. This
indicates that the remote end of the link has not
responded to a protocol packet within the appropriate
amount of time. For example, when a Clear Request
packet is sent, the remote end must respond within
timerT23secondswithaClearConfirm.Thisstatus
message is sent when the timer expires without having
seen a response from the remote end of t he link.
Typically, this will cause the VC to be reset or cleared
depending on the particular protocol packet that timed
out.
ST25DATT O (97) VC data acknowledgment timeout has occurred.
Thatis,theremoteendofthelinkhasnotRR’dasent
data packet within the required T25 time. Note that if
the T25 timer is disabled, this status message will not
be generated. This will cause the VC to be reset.