PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 97

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

2.5.6.6
This test uses a number of IX_I4voil16 frames to check the loss of synchronization. The first
Info 3 frame with the F
since the receiver stays synchronous (see FAinfD_1fr).
Device
PEB 2085 V2.3
PEB 2086 V1.1
2.5.6.7
This test uses I4_BASIC frames to regain the frame alignment. The protocol tester evaluates
the difference between sending the first info 4 frame until a complete info 3 frame has been
received. This period is considered as "m + 1". "m" must be specified before the test is started.
The PEB 2085 achieves always a constant value of m = 4 for regaining synchronization. The
PEB 2086 or PSB 2186 achieve synchronization after 5 or 6 frames. The actual value depends
on internal timing conditions which can not be influenced from extern. This is a result of
changes that were made to handle the iXvoil16 test case correctly. The info 4 pattern
generates the second code violation at the position of the F
state machine changes its states. As a result of that overlap, the info 3 frame is transmitted
after 5 frames or one frame later.
Semiconductor Group
FAinfD_kfr
FAregain
Info 4
Info 3
Info X
Settings
n = any value
n = 2
A
-bit set to one looks like an i3_SFAL frame but it is a correct info 3 frame
Info
1
4
Info
Info
4
Info 4
3
2
Result
Fail
Pass
Info 4
Info
3
3
F
97
A
with
=
1
Info 4
F =
A
4
1
Info 4
Comments
The PEB 2085 doesn´t handle the
code violation in bit 16 correctly.
5
I3_SFAL
A
F =
A
bit. Around that bit position, the
1
Functional Description
Info 4
Info 3
6
Info 4
Info
ITD05904
7
3
ITD05903