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Diagnostic Messages

X.25 Diagnostic Messages

Appendix C 253

164 (CLEAR) Fast select not

subscribed.

CALL INDICATION requiring fast select facility

has been received and fast select is not

configured. Results in error when detected on

CALL REQUEST.

225 (CLEAR) Disconnection

(transient

condition).

X.25 subsystem is down when X.25/9000 to IP

subsystem is servicing CALL CONFIRMATION

or incoming DATA.

Table C-9 OSI Network Service Problem

Diagnostic

ISO

Description

Explanation

227 (CLEAR) Connection

rejection.

Cause

unspecified

(transient

condition).

Due to internal constraints at high levels other

than lack of network memory, CALL

INDICATION cannot be serviced.

224 (CLEAR,

RESET)

OSI Network

Service

problem.

OSI network service not operational.

228 (CLEAR) Connection

rejection.

Reason

unspecified.

(Permanent

condition)

(Transient

condition).

X.25 to IP subsystem clears incoming CALL

INDICATION which has calling address not

present in IP to X.121 mapping table. If call were

accepted, circuit would be half-duplex enabling

remote node to send and receive while local host

would only be able to receive. When X.25/IP

output routine has data addressed to remote

node it must be able to map the IP address to the

X.121 address. If it cannot do so, the IP packet is

discarded. Clearing the INCOMING CALL when

the remote's X.121 address is not in the map

table prevents a half-duplex circuit from being

established.

Table C-8 DTE-Specific Signals (Continued)

1 2 ... 248 249 250 251 252 253 254 255 256 257 258 259 260 261

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