pef22504 Infineon Technologies Corporation, pef22504 Datasheet - Page 90

• Manufacturer Part Number: pef22504
• Description: Quad E1/t1/j1 Line Interface Component For Long- And Short-haul Applications Pef 22504 E, Pef 22504 Ht, Version 2.1
• Manufacturer: Infineon Technologies Corporation

Switching between active and stand-by modes can be achieved by a single common board signal which is
connected at the RLT, XLT and RTDMT inputs of both channels . In this application both receive channels are
working in parallel for redundancy purpose. While one of them builds an interface with a receive termination
resistance matched to the line impedance Z
Figure 28
Table 19
Configuration
XLT, XLT
RTDMT
RLT
Receive system interface
Receive line interface
RLM mode
Two types of general redundancy applications like shown in
•
•
For both applications the general configuration shown in
Data Sheet
A first application were the values of the external resistors R
Z
A so called “generic” redundancy application were the values of the external resistors R
different line impedances Z
0
.
General Redundancy Application (shown for one line)
General (proposed) Configuration for Redundancy Applications, Switching with only one
Board Signal
Transmit Line
Receive Line
E1/T1/J1
E1/T1/J1
PC1.XPC1(3:0)
PC1.RPC1(3:0)
PC2.RPC2(3:0)
SIC3.RRTRI
LIM0.RTRS
LIM0.RLM
0
.
Register Bits
0
, the other one is switched into high impedance mode.
R
R
S
S
R
R
R
R
SER
SER
SER
SER
90
Table 19
1000
1101
1000
0
0
0
XL1
XL2
RL1
RL1
RLAS2
RL2
XL1
XL2
RL1
RL1
RLAS2
RL2
Figure 28
(active/stand-by)
(XPA)
(XPA)
S
XLT
XLT
Active/stand-by
stand-by/active
SIC3.RRTRI = ´0´
LIM0.RTRS = ´0´
SIC3.RRTRI = ´1´
LIM0.RTRS = ´1´
and R
Channel 1
Channel
Channel
is used.
QLIU_longhaul_red
(RPB)
(RPB)
RLT
RLT
SER
can be configured:
RTDMT
RTDMT
(RPA)
(RPA)
are dependend on the line impedance
RDO
RSIG
RDO
RSIG
XDI
XDI
1110
1101
1000
1
1
0
´low´/´high´
Functional Description
(stand-by/active)
Rev. 1.3, 2006-01-25
S
Channel 2
and R
QuadLIU
PEF 22504
SER
are fix for
TM