TNTmpd maps it's contact fields exactly to Outlook.  But once in Outlook, only certain phone number fields sync into the Palm Treo.  
Palm only supports 7 phone numbers per contact.  Here is their mapping to Outlook:
| 
 Palm Name 
 | 
 Outlook/TNT Field 
 | 
| 
 work 
 | 
 Business 
 | 
| 
 main 
 | 
 business2 
 | 
| 
 fax 
 | 
 business fax 
 | 
| 
 home 
 | 
 Home 
 | 
| 
 other 
 | 
 home2 
 | 
| 
 mobile 
 | 
 Mobile 
 | 
| 
 pager 
 | 
 Pager 
 | 
  So, if you want the phone number in TNTmpd to show up on a Treo (via Outlook), here are the fields in TNT that make it all the way to the phone.  

 
For example, I put the guy's cell phone in "mobile" and the woman's in "pager" and update the labels respectively.  
I hope this is helpful,
Marc