Basic Knowledge; Message Sequences For Layer 3; Figure 2-2 Message Sequences For Layer3 - NEC NEAX 2400 IPX Programming Manual

GENERAL INFORMATION

3. BASIC KNOWLEDGE

3.1 MESSAGE SEQUENCES FOR LAYER 3

The message sequence for call establishment and clearing is shown in
State of
Originating
User Side
Null
(0)
Call Initiated
(1)
OG call
Proceeding
(3)
Call Delivered
(4)
Active
(10)
Disconnect
Request
(11)
Null
(0)
Note 1: <Call established message>
ALERT:
CALL PROC: Call Proceeding
CONN:
CONN ACK:
PROGRESS:
SETUP:
Note 2: The number in ( ) shows Call state value for User or Network.
CHAPTER 2
Page 4
Revision 1.0
OG Side
Null
(0)
SETUP
Call Initiated
(1)
CALL PROC
OG call
Proceeding
ALERT/PROG
(3)
Call Delivered
(4)
CONN
CONN ACK Active
(10)
DISC
Disconnect
Request
REL
(11)
Release
Request
RELCOM
(19)
Null
(0)
Alerting
Connect
Connect Acknowledge
Progress
Setup

Figure 2-2 Message Sequences for Layer3

Figure
State of Network
IC Side
Null
(0)
Call Present
(6)
IC call
Proceeding
(9)
Call Received
(7)
Connect
Request
(8)
Active
(10)
Disconnect
Indication
(12)
Null
(0)
<Call clearing message>
DISC:
REL:
RELCOM:
NDA-24305
2-2.
State of
Terminating
User Side
Null
(0)
SETUP
Call Present
(6)
CALL PROC
IC call
Proceeding
ALERT/PROG
(9)
Call Received
(7)
CONN
Connect
Request
CONN ACK
(8)
Active
(10)
DISC
Disconnect
Indication
REL
(12)
Release
Request
RELCOM
(19)
Null
(0)
Disconnect
Release
Release Complete