I am intentionally resurrecting this decade-old topic because (sadly) it still applies today.
This DIY CS44a cable converter project converts Phonak/Unitron CS44a cables (that have pins 3&4 reversed for some obscure reason) into standard CS44 cables for using with other than Phonak/Unitron hearing aids.
Here’s a picture of the original DIY converter cables (which I just pulled out of my desk drawer to snap a picture);
But I still like @brec 's variant better! This variant uses professional-looking RJ45 connectors instead of soldering.
