0

Number Unobtainable

1

Address Incomplete

2

Network Termination

3

Service Unavailable

4

Subscriber Incompatible

7

Congestion

8

Busy

9

Subscriber Out of Service

10

Incoming Calls Barred

19

Service Incompatible

20

Acknowledgment

21

Signal Not Understood

22

Signal Not Valid

23

Service Temporarily Unavailable

24

Facility Not Registered

25

Reject

26

Message Not Understood

27

Signaling System Incompatible

28

Route Out of Service

29

Transferred

30

NAE (Network Address Extension) Error

35

Channel Out of Service

36

Priority Forced Release

41

Access Barred

45

DTE Controlled Not Ready

46

DTE Uncontrolled Not Ready