IBM3009K2672
IBM SONET/SDH Framer
9.3: GCasc (Lower Nibble) [385A H]
Signal Name
Bits
Access
Default
Description
Defines cascading of SONET/SDH macros and SONET/SDH framer chips
in transmit direction:
One SONET/SDH framer used, each SONET/SDH macro operates
individually (8 bits):
0001,0111: up to 4 x STS-3c (4 x 155 Mb/s ATM )
1000: up to 4 x STM-1 (4 x 155 Mb/s ATM )
One SONET/SDH framer used, four SONET/SDH macros operate in
parallel:
0011: 1 x STS-12 (4 x 155 Mb/s ATM)
GCascTx(3:0)
3:0
R/W
1000
1001: 1 x STM-4 (4 x 155 Mb/s ATM or 4 x VC4)
1010,1101,1110,1111: 1 x STM-4c (1 x 622 Mb/s ATM or 1 x
VC4-4c)
Four SONET/SDH framers used, all SONET/SDH macros operate in
parallel:
1011: 1 x STM-16 (16 x 155 Mb/s ATM or 16 x VC4)
1100: 1 x STM-16 (4 x 622 Mb/s ATM or 4 x VC4-4c)
0000, 0010, 0100, 0101, 0110: Do Not Use
9.4: GCasc (Upper Nibble) [385A H]
Signal Name
Bits
Access
Default
Description
Defines cascading of SONET/SDH macros and SONET/SDH framer chips
in receive direction:
One SONET/SDH framer used, each SONET/SDH macro operates
individually (8 bits):
0001,0111: up to 4 x STS-3c (4 x 155 Mb/s ATM )
1000: up to 4 x STM-1(4 x 155 Mbit/s ATM )
One SONET/SDH framer used, four SONET/SDH macros operate in
parallel:
0011: 1 x STS-12 (4 x 155 Mb/s ATM)
GCascRx(3:0)
7:4
R/W
1000
1001: 1 x STM-4(4 x 155 Mb/s ATM or 4 x VC4)
1010,1101,1110,1111: 1 x STM-4c (1 x 622 Mb/s ATM or 1 x VC4-
4c)
Four SONET/SDH framers used, all SONET/SDH macros operate in
parallel:
1011: 1 x STM-16 (16 x 155 Mb/s ATM or 16 x VC4)
1100: 1 x STM-16 (4 x 622 Mb/s ATM or 4 x VC4-4c)
0000, 0010, 0100, 0101, 0110: Do Not Use
Register Descriptions
Page 130 of 279
ssframer.01
8/27/99
IBM [ IBM ]
