PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 301

• Manufacturer Part Number: PEB22554
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Framer Mode Register 4 (Read/Write)
Value after RESET: 00
FMR4
AIS3…
TM…
XRA…
SSC1/0…
Semiconductor Group
7
AIS3
Select AIS Condition
0…
1…
Transparent Mode
Setting this bit enables the transparent mode:
In transmit direction bit 8 of every FS/DL time-slot from the system
internal highway (XDI) is inserted in the F-bit position of the outgoing
frame. Internal framing generation, insertion of CRC and DL data is
disabled.
Transmit Remote Alarm (Yellow Alarm)
If high, remote alarm is sent via PCM route. Clearing the bit will
remove the remote alarm pattern. Remote alarm indication depends
on the multiframe structure as follows:
F4:
F12: – FMR0.SRAF = 0: bit2 = 0 in every speech channel
ESF: –
11111111000…’ in data link channel
F72: bit2 = 0 in every speech channel
Select Sync Conditions
Loss of Frame Alignment (FRS0.LFA or opt. FRS0.LMFA) is declared
if
00 = 2 out of 4 framing bits
TM
H
AIS (blue alarm) is indicated (FRS0.AIS) when two or less
zeros in the received bit stream are detected in a time interval
of 12 frames (F4, F12, F72) or 24 frames (ESF).
AIS (blue alarm) detection is only enabled when QuadFALC is
in asynchronous state. The alarm is indicated (FRS0.AIS) when
– three or less zeros within a time interval of 12 frames (F4,
– five or less zeros within a time interval of 24 frames (ESF)
bit2 = 0 in every speech channel
– FMR0.SRAF = 1: FS-bit of frame 12 is forced to ‘1’
– FMR0.SRAF = 1: bit2 = 0 in every speech channel
F12, F72), or
are detected in the received bit stream.
XRA
FMR0.SRAF
SSC1
301
SSC0
=
0:
Operational Description T1 / J1
AUTO
pattern
FM1
‘1111111100000000
0
FM0
PEB 22554
(x20)
09.98