A method of automatically sharing and transferring information between a
Work at Work (WAW) ISDN telephone and a Work at Home (WAH) ISDN
telephone. This information includes, calling line identifier delivery
from the WAW telephone to the WAH telephone, facilitating subsequent
transferring of the call to the WAH telephone if desired. Message waiting
status is also shared, facilitating the coordination of message waiting
lamps at both the WAW and WAH telephone. Information from one telephone
to the other is carried transparently through the ISDN network as
user-to-user information, calling party subaddress, D channel X.25 packet
message, lower layer compatibility or a combination of these elements.
The telephones automatically establish ISDN calls between themselves and
swap information pertaining to the status of the companion telephones.