TXC-03453BROG Transwitch Corporation, TXC-03453BROG Datasheet - Page 76

• Manufacturer Part Number: TXC-03453BROG
• Manufacturer: Transwitch Corporation

Specifications of TXC-03453BROG

• Screening Level: Industrial
• Package Type: BGA
• Lead Free Status / Rohs Status: Compliant

September 2003
TL3M
TXC-03453B
PRELIMINARY TXC-03453B-MB, Ed. 3
Address
(cont.)
XC5
Bit
4
3
2
POH2RAM Path Overhead Bytes to RAM: This bit works in conjunction with the
RAISGN
RAISEN
Symbol
EXnn control bits that select POH bytes (e.g., EXF2). The following table
summarizes the action taken by this bit and an EXnn bit:
Generate Receive Line AIS: A 1 written into this position generates a
DS3/E3 AIS towards the line (RPOSn, RNEGn) independent of the state of
the receive AIS enable bit (RAISEN).
Receive AIS Enable: A 1 enables receive E3 or DS3 Line AIS to be gen-
erated when the following alarms/conditions occur:
The logic diagram for generating receive line AIS is given below. The +
symbol represents an OR function, while & represents an AND function.
Control bit states are given by the = sign.
- Loss of Drop bus clock alarm (DLOC)
- Loss of Drop bus J1 alarm (DLOJ1)
- E1 AIS alarm (E1AIS) and XALM2AIS is 0, and ALM2AIS is a 1
- ISTAn or PAISn lead high and XALM2 is 1, and ALM2AIS is a 1
- Loss of pointer (LOP) (TUG-3)
- Path AIS (PAIS) (TUG-3)
- PSLERR or C2EQ0 occurs, and Path Signal Label Error Enable AIS
BFOM1=1
LOP (Alarm) (TUG-3)
PAIS (Alarm) (TUG-3)
DLOJ1 (Alarm)
DLOC (Alarm)
E1AIS (Alarm)
XALM2AIS=0
ISTAn lead high
PAISn lead high
XALM2AIS=1
ALM2AIS=1
PSLERR (Alarm)
C2EQ0 (Alarm)
PSL2AIS=1
RAISEN=1
RAISGN=1
control bit (PSL2AIS) is a 1
POH2RAM
X
1
0
DATA SHEET
- 76 of 96 -
EXnn (reg. XC3H)
&
+
+
&
1
1
0
&
+
+
Description
&
&
POH interface byte transmitted and
written to RAM location for the
selected overhead byte.
POH interface byte transmitted for
the selected byte; the RAM loca-
tion holds a microprocessor-written
overhead byte value.
The POH byte written to RAM by
the microprocessor is transmitted.
+
&
Action
+
Send Rx AIS
for Channel n