The following is a list of fields in Phone Book Administrator that have character restrictions, and the characters that each does not accept.
| Field | Restricted Characters |
| Server host name | Space |
| Phone Book name | *<>|"?'/\:=% |
| POP name | Comma , |
| DUN entry | Comma , |
| Region name | Comma , |
| User name | Space |
The following is a list of the types of characters that Phone Book Administrator does accept.
| Field | Characters allowed |
| Area Code | All numbers # * - space |
| Access Number | All numbers # * - space |
| Min analog speed | Numerical digits 0-9 |
| Max analog speed | Numerical digits 0-9 |
Note
Phone book names created using double-byte characters cannot be posted to a Connection Point server running on a single-byte version of Windows NT Server version 4.0.