IBM3009K2672
IBM SONET/SDH Framer
OC-48/STM-16 Expansion Port
An interesting feature of the IBM SONET/SDH framer is that it can be combined with three other
SONET/SDH framers to form an STS-48 or STM-16 signal that consists of either 4 x STM-4, 4 x STM-4c,
4 x STS-12, or 4 x STS-12c. The parallel line interfaces are used in this application. A MUX/DEMUX device
that performs clock recovery and synthesis is needed to interface the OC-48 or STM-16 serial stream to the
SONET/SDH framers. Operation on page 88 contains details for connecting four SONET/SDH framers
together for OC-48/STM-16 applications.
Microprocessor Interface
The SONET/SDH framer has a built-in processor interface which is compatible with the Motorola 68360 pro-
cessor bus and is adaptable to be compatible with the Intel-type processor bus. Interrupt capability is pro-
vided via an interrupt pin and interrupt mask bits. Access to the various configuration registers, counters,
control, and status registers is provided via this interface.
There are four operating modes available:
• Motorola synchronous
• Intel synchronous
• Motorola asynchronous
• Intel asynchronous
Boundary Scan
The Boundary Scan Port includes a five-pin TAP that conforms to the IEEE 1149.1-1994 standard. This TAP
provides external boundary scan to read and write the SONET/SDH framer input and output pins from the
TAP for board and component testing.
ssframer.01
8/27/99
Block Diagram and Block Descriptions
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