txc-03456 TranSwitch Corporation, txc-03456 Datasheet - Page 82

• Manufacturer Part Number: txc-03456
• Description: Device Level Mapper
• Manufacturer: TranSwitch Corporation

Address
26
26
27
28
29
Bit
7
6
5
2
7
6
5
4
3
2
EXTLOS External Transmit Loss Of Signal Alarm: An alarm occurs when a low is
Symbol
AIPLOC
RPAIS
RLOP
RLOF
TLOF
NEW
RDAI
SINT
TDAI
Software Interrupt: A software interrupt indication occurs when one or more
interrupt mask bit positions are written with a 1, and the corresponding
alarms for those interrupt mask bits occur. The SINT state is exited when the
latched alarm causing the interrupt is cleared or the alarm’s corresponding
interrupt mask bit is written with a 0.
present on the EXLOS pin. When control bit EAISEN is a 1, a transmit line
AIS is generated.
Alarm Indication Port Loss Of Clock: An alarm occurs when the TAIPC
clock (which is connected to the mate L4M) has been stuck high or low for
113-764 or more consecutive RAM clock (RAMCI) periods. FEBE and RDI
are transmitted as 0 in the G1 byte. Recovery occurs on the first clock transi-
tion.
New Alarm: When the pointer tracking feature is disabled (PTEN pin is low),
this alarm indicates that the J1 pulse has jumped more than three byte posi-
tions or has made an illegal increment or decrement. When the pointer track-
ing feature is enabled (PTEN pin is high), this alarm indicates that 3 x new
pointers has been detected.
Transmit 140 Mbit/s Loss Of Frame Alarm: An alarm occurs when four
consecutive errored frame alignment patterns (based on G.751) are
detected. Recovery occurs when three consecutive frame alignment pat-
terns without errors are detected.
Receive 140 Mbit/s Loss Of Frame Alarm: An alarm occurs when four con-
secutive frame alignment patterns (based on G.751) are detected incorrectly.
Recovery occurs when three consecutive frame alignment patterns are
detected correctly.
Transmit Distant Alarm Indication: A 1 indicates that bit 13 in the transmit-
ted 140 Mbit/s G.751 format is a 1. This alarm is inhibited when loss of frame
alignment (TLOF), or when a transmit 140 Mbit/s AIS is detected, or when
an errored transmit frame is detected (only for that particular errored frame).
Receive Distant Alarm Indication: A 1 indicates that bit 13 in the received
140 Mbit/s G.751 format is a 1. This alarm is inhibited on a loss of frame
alignment (RLOF), or when a receive 140 Mbit/s AIS is detected, or when an
errored receive frame is detected (only for that particular errored frame).
Receive Loss Of Pointer Alarm: Enabled when the pointer tracking feature
is enabled (PTEN lead is high). An alarm occurs when loss of pointer has
been detected in the pointer tracking machine.
Receive Path AIS Alarm: Enabled when the pointer tracking feature is
enabled (PTEN lead is high). An alarm occurs when path AIS has been
detected in the H1 and H2 bytes.
DATA SHEET
- 82 -
Description
Ed. 1A, January 2000
TXC-03456
TXC-03456-MB
L4M