Took a further hour to find suitable free hold music, convert the raw alaw file to look like a WAV file (simple header), test it all, and pick which music... :-)
Now the core is stable, some ancillary projects for me to consider...
- Voicemail application
- General IVR (interactive voice response) application
- Land-line text application (acting as land-line text server)
- Fax2email application