Listen up Peter....
Touchdown (and Outlook for that matter) have always had the ability to dial phone numbers in the LOCATION FIELD. Corporations routinely put conference call telephone numbers in the location field.
With your new less capable version, this functionality has been lost. We are asking you to do some simple logic... if the LOCATION field holds a telephone format then dial a number, anything else, link to maps.
If this perplexes you, I can help you with the If-then statement. Or, you can just put it back the way it was with TD before you removed capability.
Please remember, you are a developer, not an end user. Please try and meet your customer requirements and NOT tell us what to expect.
Thank you.