37. A switching system having an internal numbering plan for use in a telecommunications network having a network numbering plan, comprising: means, responsive to receipt, from a user directly served by the switching system, of a first symbol sequence that is included in the internal numbering plan, for interpreting the received first symbol sequence at the switching system to be a feature access code of a feature of the switching system, and further responsive to receipt of a second call-control symbol sequence that is included in the network numbering plan and that is assigned, within the network numbering plan, to the switching system, for interpreting the received second symbol sequence to be an equivalent of said feature access code of the internal numbering plan of the switching system, said feature access code being a different symbol sequence from the received second symbol sequence; and means responsive to the interpretation of the first symbol sequence, for invoking in the switching system said feature, and further responsive to the interpretation of the second symbol sequence, for invoking in the switching system a same feature as is invoked by receipt of said feature access code from the user directly served by the switching system.
37. A switching system having an internal numbering plan for use in a telecommunications network having a network numbering plan, comprising: means, responsive to receipt, from a user directly served by the switching system, of a first symbol sequence that is included in the internal numbering plan, for interpreting the received first symbol sequence at the switching system to be a feature access code of a feature of the switching system, and further responsive to receipt of a second call-control symbol sequence that is included in the network numbering plan and that is assigned, within the network numbering plan, to the switching system, for interpreting the received second symbol sequence to be an equivalent of said feature access code of the internal numbering plan of the switching system, said feature access code being a different symbol sequence from the received second symbol sequence; and means responsive to the interpretation of the first symbol sequence, for invoking in the switching system said feature, and further responsive to the interpretation of the second symbol sequence, for invoking in the switching system a same feature as is invoked by receipt of said feature access code from the user directly served by the switching system. 39. The switching system of claim 37 wherein: the interpreting means comprise means for translating the received second symbol sequence into the feature access code.