When we send a Fax Cover Page using our LaserWriter 16/600f, the last 2 digits of the "Sender" phone number field are not sent correctly. Instead, high level ascii characters (an angstroem character and an "@" symbol) are sent. The phone number we are sending is +41-1-446 3 XY, where X is sent as an angstroem character and Y as an @.
This problem is occurring because of spaces. If you delete the spaces between the numbers in the phone number field, the problem will not occur.