PM4358 COMET OCTAL and PM4359 COMET TETRA E1/T1/J1 Framers + LIU now in full production
The COMET TETRA is PMC-Sierra's newest 4 Port T1/E1 Framer+LIU.
COMET TETRA is lower power, lower cost and feature enhanced with internal terminations and relayless redundancy vs COMET QUAD.
COMET TETRA reuses all of the digital logic from the COMET QUAD.
Therefore only minor modifications to existing software are required for the COMET TETRA.The COMET TETRA is the best choice for all new 4 port T1/E1 designs.
95%+ Software compatibility to COMET and COMET-QUAD allows for reuse of existing qualified software. All digital blocks for Framer reused from COMET-QUAD use the same register memory map.
Top level registers for LIU are extremely similar to COMET-QUAD. Some new registers and bits have been added to accommodate new features and feature enhancements.
Register differences are outlined in Software Migration app note (PMC-2060046) LIU Memory Tables use different values as shown in Configuration Guide (PMC-2052234).
In the case of the COMET OCTAL, the memory space is 1 bit wider to accommodate registers for 8 channels.
COMET OCTAL and COMET TETRA advantages
- Lower cost per port than COMET QUAD
- 100% pin and hardware compatibility for 4 and 8 port designs
- Fully software compatible with the COMET QUAD
- Compact Footprint (17x17mm)
- Low Power per channel (150mW)
- Full line card solution with COMET OCTAL and IMA, AAL1gator, FREEDM or network processors
Feature Enhancements
- One design for T1, E1 and J1 with integrated line-side termination
- Internal support for redundancy applications - No external relays
- Hardware-only mode using SPI interfaceWeb Links
Applications
- 2G/3G Wireless Base Transceiver Station / Node B
- Digital Loop Carriers (DLC)
- Enterprise Routers
- DSLAM
- PON Optical Line Termination (OLT)
- Voice Gateways