British Telecommunications Public Limited Company

British Telecommunications Corporation

Peter Bernard Key

Francis Patrick Kelly

Richard John Gibbens

Thomas Rhodri Griffiths

Martin J Whitehead

Roger R Stacey

Mark Woolley

Paul A Turton

Roger G Ackerley

Andrew David Atkinson

To provide secure communications to a PBX ( ) the PBX is connected to two different local exchanges of the PSTN. On recognising a telephone number designating calls to the PBX service switching points ( ) apply to service control points ( ) for route translations. The SCP ( ) directs calls though the network alternately to network connections on one DLE (say ) and then to the other DLE ( ). In the event of a predetermined number of call failure on one of the route all subsequent calls are directed to the other route until a predetermined number of call failures occur on the other route where upon consecutive calls are again offered alternately.

Telecommunications network having successively utilized different network addresses to a single destination

A communication network includes a number of network nodes linked together by transmission paths. A network manager controls acceptance of calls onto transmission paths by classifying an incoming call and selecting from the database an appropriate mean to peak bit rate distribution. This selected distribution is then used with the monitored transmission path load to determine a posterior distribution which reflects the load. The decision to accept or reject the call is made on the basis of the posterior distribution by a call acceptance algorithm considering the effective bandwidth for example.

Communication network control method and apparatus

Method and apparatus for controlling a communications network

A communication network (1) comprises a number of network nodes (2, 3, 4 and 5) linked together by transmission paths (6, 7 and 8). A network manager (9) controls acceptance of calls onto transmission paths by classifying an incoming call and selecting from the database (14) an appropriate mean to peak bit rate distribution. This selected distribution is then used with the monitored transmission path load to determine a posterior distribution which reflects the load. The decision to accept or reject the call is made on the basis of the posterior distribution by a call acceptance algorithm considering the effective bandwidth for example.

Communication network control method

A method and apparatus for routing traffic in a circuit switched network. A call between two nodes interconnected by a direct link is first offered to the direct route, and if that is blocked it is offered to a currently nominated two-link alternative route between the two nodes. If that route is busy, the call is lost, and a randomly chosen two-link route is assigned to be the new current nominated alternative route. The strategy is particularly effective because it is simple, available routes are quickly located and once one available route is found, that same route is used for rerouting further calls until it is full. Trunk reservation protection is applied on alternative routes.

Routing of network traffic

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Woodbridge, United Kingdom

Peter Bernard Key