2024年6月11日发(作者：)

GSM未接通代码

GSM未接通代码解释

1 Normal class

1.1 Cause No. 1 "unassigned (unallocated) number"（未分配

的号码）

This cause indicates that the destination requested by the

mobile station cannot be reached because, although the number

is in a valid format, it is not currently assigned (allocated).

1.2 Cause No. 3 "no route to destination"（目的地无路由）

This cause indicates that the called user cannot be reached

because the network through which the call has been routed

does not serve the destination desired.

1.3 Cause No. 6 "channel unacceptable"（信道无法接受）

This cause indicates the channel most recently identified is

not acceptable to the sending entity for use in this call.

1.4 Cause No. 8 "operator determined barring"（操作者定义

禁止）

This cause indicates that the MS has tried to access a service

that the MS's network operator or service provider is not

prepared to allow.

1.5 Cause No.16 "normal call clearing"（正常的呼叫清除）

This cause indicates that the call is being cleared because

one of the users involved in the call has requested that the call

be cleared.

Under normal situations, the source of this cause is not the

network.

1.6 Cause No.17 "user busy"（用户忙）

This cause is used when the called user has indicated the

inability to accept another call.

It is noted that the user equipment is compatible with the

call.

1.7 Cause No. 18 "no user responding"（用户无响应）

This cause is used when a user does not respond to a call

establishment message with either an alerting or connect

indication within the prescribed period of time allocated (defined

by the expiry of either timer T303 or T310).

1.8 Cause No. 19 "user alerting, no answer"（用户振铃，无应

答）

This cause is used when a user has provided an alerting

indication but has not provided a connect indication within a

prescribed period of time.

1.9 Cause No. 21 "call rejected"（呼叫拒绝）

This cause indicates that the equipment sending this cause

does not wish to accept this call, although it could have accepted

the call because the equipment sending this cause is neither busy

nor incompatible.

1.10 Cause No. 22 "number changed"（号码变换）

This cause is returned to a calling mobile station when the

called party number indicated by the calling mobile station is no

longer assigned. The new called party number may optionally be

included in the diagnostic field. If a network does not support

this capability, cause No. 1 "unassigned (unallocated) number"

shall be used.

1.11 Cause No. 26 "non-selected user clearing"（未选择的用

户清除）

Not supported. Treated as cause no. 31.

1.12 Cause No. 27 "destination out of order"（目的端命令超

出）

This cause indicates that the destination indicated by the