Agilent Technologies Auroraduet N1726A, Руководство пользователя, Страница: 296 / 507

Issue 01 - 06/99 6 - 17
Analysing Protocol Decode
Decode - A Look at Some Examples
Example of ISDN Decode
The following illustrates a typical example of protocol
decode, generated during call setup and clear down:
Decode Output Explanation
N<T 15:37:23.752 Fr.1
L2: Sapi=0 Tei=64
SABME
pf=1
00 81 7F
Terminal Equipment
sends SABME to Network
at 15:37, to initialise
layer 2. Contains SAPI=0,
TEI=64.
N>T 15:37:23.808 Fr.2
L2: Sapi=0 Tei=64
UA
pf=1
00 81 73
Network responds with a
UA to acknowledge layer
2 is active.
N<T 15:37:23.822 Fr.3
L2: Sapi=0 Tei=64
INFO
pf=0 Nr=0 Ns=0
00 81 00 00
L3: PD=08 CR(O)=2
M05 SETUP
I04 bcap=Speech A Law
I18 channel=B1
IA1 sending complete
I6C cli=01628524977
Allowed
I70 cpn=01613391132
I71 cpn sub=PHIL
I7E uui=TESTCALL
08 01 02 05 A1 04 03
80 90 A3 18 01 89 6C
0D 01 80 30 31 36 32
38 35 32 34 39 37 37
70 0C 81 30 31 36 31
33 33 39 31 31 33 32
71 06 80 50 50 48 49
4C 7E 09 04 54 45 53
54 43 41 4C 4C
TE sends a call Setup
message: Bearer
Capability = Speech,
Encoding Type = A-law,
on channel B1,
CLI=01628524977,
CPN=01613391132 and
sub-address = Phil and
User to User Info. =
Testcall.
N>T 15:37:23.906 Fr.4
L2: Sapi=0 Tei=64
INFO
pf=0 Nr=1 Ns=0
02 81 00 02
L3: PD=08 CR(D)=2
M02 CALL PROC
I18 channel=B1
08 01 82 02 18 01 89
Network responds to the
Call Setup request with a
Call Proceeding message.
N<T 15:37:24.004 Fr.5
L2: Sapi=0 Tei=64
RR
pf=0 Nr=1
02 81 01 02
TE transmits an RR
(Receiver Ready) to keep
alive the link at layer 2.
Chap6.PM6 17/06/99, 09:49 17