NEC NDA-24300 manual Call Source, Reason Class Kind Data Reason Kind Value

➂Virtual Tie Line Call Header Accommodated Location

b7 b6 b5 b4 b3 b2 b1 b0

	SYSTEM MESSAGES
b3-b7: Call Source
DATA	CALL SOURCE
0	User
1	Private network to which the user is directly connected.
	(Self side)
2	National network to which the user is directly connected.
	(Self side)
3	Tie-Line Network
4	National network to which the opposite party is directly
	connected. (Opposite party’s side)
5	Private network to which the opposite party is directly
	connected. (Opposite party’s side)
7	International Network
A	Network from Interworking
Other	Spare

b4-b7: “8” is always indicated.

➃ Fault Cause								b0-b3: Reason Kind
b7	b6	b5	b4	b3	b2	b1	b0	b4-b6: Class
									0=No Answer
									Other than 0=Refer to the following table
									REASON
							CLASS		KIND	DATA	REASON KIND
									VALUE
							000		0001	1	Dead Number
							000		0010	2	No route to the designated transit network
							000		0011	3	No route to the opposite Party
				Reason Kind			000		0110	6	Use of channel not allowed
Class					Value		000		0111	7	Call terminated to a setup channel
X					X		001		0000	16	Normal disconnection
							001		0001	17	Called user busy
8765					4321(bit)		001		0010	18	No response from called user
							001		0011	19	Called party being rung/no answer
-000							001		0101	21	Communication denied
				xxxx			001		0110	22	Opposite party’s terminal number changed
-001							001		1010	26	Disconnection and release of the user not selected
							001		1011	27	Opposite party’s terminal out of order
Normal Event Class							001		1100	28	Invalid number format (Incomplete Number)
							001		1101	29	Facility denied
							001		1110	30	Answer to status inquiry
							001		1111	31	Other normal class

NDA-24300CHAPTER 3

Page 185

Issue 1