Alternate routing for a telephone system
First Claim
1. An alternate routing system for a plurality of telephone switching offices, said system comprising:
- at least one group of trunk lines connecting any one switching office in said system to any other switching office in said system;
a first plurality of storage locations, at each said switching office, for storing an indication of the terminating office to which a call is directed;
a second plurality of storage locations, at each said switching office for storing an indication of the switching office most likely to be available as a tandeming office between the originating switching office and the terminating switching office;
a third plurality of storage locations, at each said switching office, for storing an indication of the trunk lines to be used for accessing the switching office indicated by said second plurality of storage locations as being the tandeming offices; and
means for periodically updating the information stored in said second plurality of storage locations, concerning the switching office to be employed as a tandeming office.
2 Assignments
0 Petitions
Accused Products
Abstract
An alternate routing scheme for a telephone system wherein a plurality of switching offices are grouped into a cluster, with each switching office in the cluster having direct trunk lines to all the other switching offices in its cluster. This allows each switching office in the cluster to serve the dual function both of an originating (or terminating) office and of a tandeming office for its own cluster. Suitable equipment monitors the busy status of all the switching offices in the cluster, and determines a most likely alternate routing scheme for each switching office. The alternate routing scheme for each particular switching office is stored at that particular office and is periodically updated, by suitable equipment, so as to account for changes in the busy status of the other switching offices and trunk lines in the cluster.
120 Citations
14 Claims
-
1. An alternate routing system for a plurality of telephone switching offices, said system comprising:
-
at least one group of trunk lines connecting any one switching office in said system to any other switching office in said system; a first plurality of storage locations, at each said switching office, for storing an indication of the terminating office to which a call is directed; a second plurality of storage locations, at each said switching office for storing an indication of the switching office most likely to be available as a tandeming office between the originating switching office and the terminating switching office; a third plurality of storage locations, at each said switching office, for storing an indication of the trunk lines to be used for accessing the switching office indicated by said second plurality of storage locations as being the tandeming offices; and means for periodically updating the information stored in said second plurality of storage locations, concerning the switching office to be employed as a tandeming office. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An alternate routing system for a plurality of telephone switching offices, said system comprising:
-
at least one group of trunk lines connecting any one switching office in said system to any other switching office in said system; each said switching office including a first plurality of storage locations, a second plurality of storage locations, and a third plurality of storage locations; said first plurality of storage locations, at each said switching office, storing, as an addressed location for said second plurality of storage locations, an indication of the terminating office to which a call is directed; said second plurality of storage locations, at each said switching office, storing, as an addressed location for said third plurality of storage locations, an indication of the switching office most likely to be available as a tandeming office between the originating switching office and the terminating switching office; said third plurality of storage locations, at each said switching office, storing, as an address location for said first plurality of storage locations, an indication of the trunk lines to be used for accessing the switching office indicated as being the tandeming office by said second plurality of storage locations; and means for periodically updating the information stored in said second plurality of storage locations, concerning the switching office to be employed as a tandeming office. - View Dependent Claims (7, 8, 9, 10, 11)
-
-
12. An alternate routing method for a plurality of telephone switching offices interconnected in a system configuration wherein any two switching offices in said system are interconnected by at least one group of trunk lines, said method, at an originating switching office, comprising:
-
storing, in a first addressable storage location, an address indicative of a terminating switching office; storing, in a second addressable storage location addressed by the contents of said first storage location, an address indicative of a tandeming switching office to be employed intermediate said originating and terminating switching offices; storing, in a third addressable storage location addressed by the contents of said second storage location, an address indicative of trunk lines to be employed in accessing said tandeming switching office; and periodically updating the information stored in said second addressable storage location. - View Dependent Claims (13, 14)
-
Specification