Alphawave offers a low-area and low-power Sub-2.5G GMP (generic mapping procedure) mapper for low data rate application specified by the ITU-T G.709. This Sub-2.5G GMP mapper has a databus width of 8-bit and efficiently architect-ed and designed for small foot print with low power in mind.
Like other higher rate GMP mappers, it shares almost he same features and functions.
Sub-2.5G GMP Mapper
Overview
Key Features
- CBR Mapping of client payload into low rate – 1.25G or 2.5G ODTU.ts
- Support per tributary slot client clock
- Client side interfacing with internal asynchronous FIFO
- Line side interfacing with ODU layer interface
- Optional generic 32-bit CPU interface
- Seamless integration with Precise-ITC OTU digital wrapper at line side
- Easy to customize for specific applications
- Source direction
- Programmable OPU AIS (all 1s) generator per tributary slot (or channel) at source direction
- Client signal fail (CSF) detection at source direction
- Support internal Cm adjustment algorithm with fully software tunable parameters
- Support external Cm adjustment algorithm or software driven Cm
- Support software programmable OPU payload type (PT) byte and MSI bytes
- Sink direction
- Support software pre-define expected PT byte, MSI bytes
- Support OMFI sequence checker
- Support server signal fail (SSF) detection
- OPU CSF detection at sink direction
- Support per tributary port justification control (JC) CRC5 and CRC8 error detections
- Support per tributary port Cm changes alarms
- Supported alarm detection and interruption
- The following are the alarms supported in the source path. All are supported per tributary port.
- Cm value change alarms (for +/-1 and +/- 2)
- AIS generation alarm
- CSF detection alarm
- Asynchronous FIFO full or empty
- The following are the alarms supported in the sink path
- OPU CSF detection
- SSF detection
- PT mismatch
- OPU OMFI sequence error
- For the following alarms are per tributary port
- Cm value change alarms (for +/- 1 and +/- 2)
- TS(tributary slot) port number mismatch
- Expected last TS slot mismatch
- TS occupied bit mismatch
- JC – CRC5 Error
- JC – CRC8 Error