TMXF28155 Datasheet, PDF (16/606 Pages) Agere Systems – TMXF28155 Super Mapper 155/51 Mbits/s SONET/SDH x28/x21 DS1/E1

TMXF28155 Super Mapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Preliminary Data Sheet
May 2001
3 Pin Information (continued)
3.3.2 Protection Switch I/O Pin Description
The protection switch I/O provides additional copies of the high-speed interface signals so that various protection
schemes may be implemented. The protection interface may be used when the high-speed interface is operating in
both STS-3 and STS-1 modes. If the protection port is not used, the input clock and data may be left unconnected,
tied to power (P inputs), or ground (N inputs) through 1 kΩ resistors. Unused protection outputs should be left
unconnected.
Table 4. Protection Switch I/O Pin Description
Pin
AD10,
AE10
AC10,
AD11
AF13,
AE13
AC12,
AD13
Symbol
RPSD155P
RPSD155N
RPSC155P
RPSC155N
TPSD155P
TPSD155N
TPSC155P
TPSC155N
Type
LVDS
LVDS
LVDS
LVDS
I/O
Description
I Receive Protection Data. Receive side high-speed serial data input
from protection board.
I Receive Protection Clock. Receive side high-speed clock input from
protection board.
O Transmit Protection Data. Transmit side high-speed serial data output
to protection board.
O Transmit Protection Clock. Transmit side high-speed clock output to
protection board.
HIGH-SPEED I/O
HIGH-SPEED
PROTECTION
INPUTS
RPSMUXSEL1
STS-3 RECEIVE STS-3 TRANSMIT
FRAMER
FRAMER
TPSMUXSEL2
HIGH-SPEED
PROTECTION
OUTPUTS
TPSMUXSEL3
Figure 3. Protection Switch
3.3.3 Telecom Bus (Low-speed I/O) Pin Description
The telecom bus on the Super Mapper is used for interconnecting STS-1 signals. It has two eight-bit data buses,
one for upstream data and one for downstream data, plus clock and frame indication signals for each bus. The tele-
com bus can operate at 19.44 MHz (space for three STS-1 signals) or 6.48 MHz (space for 1 STS-1 signal).
Super Mappers in OC-3 applications are typically connected together using the telecom bus, and the bus is config-
ured to operate at 19.44 MHz.
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