very low frequency tech postings - dect/com_on_air.writeback
Fri, 03 Nov 2006DECT pcmcia cards
DECT today is seldomly found in the context of PCs. One of the few solutions out there is a Com-On-Air PCMCIA card, originally manufactured by Dosch+Amand, today solely sold by ARC Computer.
They're designed to be used with a Windows software, which then turns the PC to a DECT-VoIP (SIP) gateway.
I got my self one of the Type III and one the Type II PCMCIA cards, but figured out that there's no Windows around here. I hope to get something working on that card under linux, and I can think of more than only a DECT basestation.
As there's no public documentation for the DECT-baseband processor, I probably have to do some (and learn!) reverse-engineering to get linux-support. For now I had a look at the Windows drivers using the HT Editor which seems a brilliant (free) way to reverse-engineer all sorts of Win-SW (and even VxD LE driver binaries) under other OSes.
The CR16 CPU in the baseband processor can be programmed using AS.
- National Semiconductor PCMCIA/PCcard interface PCM16C010 (datasheet, local copy)
- National Semiconductor DECT-baseband processor SC14421CVF, contains a CR16 CPU (no public documentation, share your knowledge!)
- 2kByte microwire EEPROM 93LC86, organized as 1k*16 (datasheet, local copy)
- HCT04 hex inverter
- analog radio Type III card: LMX3161 radio transceiver (datasheet, local copy)
- analog radio Type III card: 2205AF .5W RF power amp
- analog radio Type II card: didn't look at the (availability of datasheets of) devices yet
- only Type III has a LED
If you happen to know anything about
- the DECT baseband chip SC14421CVF or others from the SC144xx family
- the flash PAI001, and why it is only on the Type III card
- the SW architecture/split of the Windows SW that comes with the cards
- any open source driver using the PCM16C010 PCMCIA/PCcard chip (OK, it's documented, but ...)
please contact me and share your knowledge.
com-on-air Type III card HW porn:
top side overall:
DECT baseband controller:
bottom side overall:
flash and EEPROM:
com-on-air Type II card HW porn:
top side overall (bottom side has no components):
Type II digital chipset (only differs from Type III in that it has no flash)
radio (all different than on Type III):
Update: the "512kByte Flash PAI001" was identtifies as hex inverter.
Dect sniffer chinese ambassyharold wrote
Please email me