A DSS1 ALERT üzenet
SS7-ISUP equivalent: Initial Address
| Information element | Direction | Type | Length | Note
|
|---|
| Protocol discriminator | Both | M | 1 |
|
| Call reference | Both | M | 2-* |
|
| Message type | Both | M | 1 |
|
3.1.7 NOTIFY
This message is sent by the user or the network to indicate information pertaining to a call, such as user suspended. See Table 3-8.
TABLE 3-8/Q.931
NOTIFY message content
Message type: NOTIFY
Significance: access
Direction: both
Information element
Reference (subclause)
Direction
Type
Length
Protocol discriminator
4.2
Both
M
1
Call reference
4.3
Both
M
2-*
Message type
4.4
Both
M
1
Bearer capability
4.5
n ® u
O (Note 1)
2-12
Notification indicator
4.5
Both
M
3
Display
4.5
n ® u
O (Note 2)
(Note 3)
NOTES
1 Included by the network to indicate a change of the bearer capability (see Annex L).
2 Included if the network provides information that can be presented to the user.
3 The minimum length is 2 octets; the maximum length is network dependent and is either 34 or 82 octets.