o  address extensions
    Default: True                                Value: True or false
    Specifies whether the "called address extension" and "calling
    address extension" fields to be included in the outgoing call
    packet.
 o  address prefix
    Address prefix to trigger the use of DTE class and destination.
    Supplied as an argument to the create command. You cannot modify
    this characteristic.
 o  destination
    Default: No DTE address                      Value: DTE address
    Manually entered DTE address. This address is used only if the
    mapping characteristic has the value manual.
 o  dte class
    Default: No class name                       Value: Class name
    Name of the DTE class to be used in making the outgoing call. If
    not specified, any DTE class may be used.
 o  mapping
    Default: X.121                              Value: Manual or X.121
    Mechanism by which the destination DTE address is to be derived.
    manual       The destination DTE address is supplied manually
                 by means of the destination characteristic.
    X.121        The destination DTE address is derived by an
                 algorithm from an NSAP address in X.121 format.
                 X.121 address mapping may only be specified with
                 address prefixes of 36, 37, 49, 52 and 53.