STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
275
Register 097H: E1 FRMR Maintenance/Alarm Status
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R
R
R
RAIV
RMAIV
AISD
Unused
RED
AIS
Unused
Unused
X
X
X
X
X
X
X
X
R
R
When the E1/T1B bit of the Global Configuration register is a logic 0 or the UNF
bit of the Receive Options register is a logic 1, this register is held reset.
Reading this register returns the current state value of the RAI, RMAI, AISD,
RED, and AIS maintenance/alarm statuses.
RAIV:
The RAIV bit indicates the remote alarm indication (RAI) value. The RAIV bit
is set to logic one when the "A" bit (bit 3 in time slot 0 of the non-frame
alignment signal frame) has been logic one for an interval specified by the
RAIC bit in the E1 FRMR Maintenance Mode Options register. When RACI is
logic 1, RAIV is set when A=1 for 4 or more consecutive intervals, and is
cleared upon reception of any A=0. When RACI is logic 0, RAI is set upon
reception of any A=1, and is cleared upon reception of any A=0. The RAIV
output is updated every two frames.
RMAIV:
The RMAIV bit indicates the remote multiframe alarm indication (RMAI)
value. The RMAIV bit is set to logic one when the "Y" bit (bit 6 in time slot 16
in frame 0 of the signaling multiframes) has been a logic one for 3
consecutive signaling multiframes, and is cleared upon reception of any Y=0.
The RMAIV bit is updated every 16 frames.
AISD:
The AISD bit indicates the alarm indication signal (AIS) detect value. The
AISD bit is set to logic one when the incoming data stream has a low zero-bit
density for an interval specified by the AISC bit in the E1 FRMR Maintenance