B-2 Smart Switch 1800 4.0 User Guide , Rev 0 1

Reset Causes

An SVC or PVC may b e re set when an erro r occur s duri ng data transm ission. T he r eset
causes transmission to be re-synchronized, and informs the user that some data might
have been lost. The reset cause sent in a Reset packet provides a high-level indication
of why the call was reset.
From DCE From DTE
Hex. Dec. Hex. Dec. Description
00 00 80 128 DTE originated
01 01 81 129 Out of order (PVC onl y)
03 03 83 131 Remote procedure error
05 05 85 133 Local procedure error
07 07 87 135 Network congestion
09 09 89 137 Remote DTE operational (PVC only)
0F 15 8F 143 Network operational (PV C only)
11 17 91 145 Incompatible destination
1D 29 9D 157 Network out of order (PVC only)

Restart Causes

When a port is restarted, all active SVCs and PVCs through the port are cleared. The
restart cause sent in a Restart packet provides a high-level indication of why the port
was restarte d.
From DCE From DTE
Hex. Dec. Hex. Dec. Description
00 00 80 128 Local procedure error
03 03 83 131 Network congestion
07 07 87 135 Network operational
7F 127 FF 255 Registration/cancellation confirmed
Diagnostic Codes

X.25 Codes

These d iagno stic co des are gen erated by th e X.2 5 netw ork in C lear, Reset , and R esta rt
Indication packets, as well as Registration Confirmation and diagnostic packets:
Hex. Dec. Description
00 00 No additional Information
01 01 Invalid P(s)
02 02 Invalid P(r)
10 16 Packet Type Invalid
(Restart Transfer Phase)
11 17 Packet type Invalid for State r1 Packet Level Ready
12 18 Packet type Invalid for State r2 DTE Restart Request
13 19 Packet type Invalid for State r3 DCE Restart Indication
(Call Setup Pha se)
14 20 Packet type Invalid for State p1 Ready
15 21 Packet type Invalid for State p2 DTE Waiting