3.3.2

3.3.2 CALL PROCEEDING

This message is sent by the called user to the network or by the network to the calling user to indicate that requested call establishment has been initiated and no more call establishment information will be accepted. See Table 3-36.

Table 3-36/Q.931

CALL PROCEEDING message content

Message type: CALL PROCEEDING Significance: local 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
Channel identification	4.5	Both	O (Note 1)	2-*
Display	4.5	n ® u	O (Note 2)	(Note 3)
NOTES 1. Mandatory in the network to user direction if this message is the first message in response to a SETUP. Mandatory in the user to network direction if this message is the first message in response to a SETUP, unless the user accepts the D-channel indicated in the SETUP message. 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.