| 摘要 |
Responsive to an incoming call (34) made to a primary telephone number subscribing to a call transfer calling service feature, a first switching node (12(1)) queries (36) a data base (20) to retrieve (38) at least one transferto secondary number. The first switching node then signals (46) other switching nodes (12) in the telephone network (10) to set up an outgoing leg (48) to each secondary number telephone. The signals transmitted by the first switching node further (50) direct each of the other switching nodes in the network to inhibit the initiation of any call transfer service features associated with the secondary number telephones. The signals may further include a transfer service indicator and a counter (80) identifying the number of prior call transfer which have occurred in connection with the originally received call. If the counter exceeds a given preset threshold (100), the other switching nodes reject further transfer of the call (102).
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