Abstract: A switch, which connects ports on a customer port module to ports on a network port module via time slots on a dime division multiplexing bus, determines for each connection a number of required time slots, based on the current switch configuration and/or the signal traffic at the associated port. The switch then determines if it has the required number of time slots available generally and if it can make the time slots available to the port. If so, the switch assigns the time slots to the port and completes the connection. The switch determines the number of time slots required by consulting a stored port type indicator table, which lists bandwidth demand based on port type, or by detecting in-band signaling information that indicates the bandwidth demand. If the table indicates that the switch includes non-blocking ports, the switch coordinates the number of time slots allocated to a connection with the number of slots required to be kept free for the non-blocking ports.

Abstract: A call processor (10) for processing integrated-services digital-network (ISDN) calls is subject to real-time control by a host computer (28) but stores rules specified ahead of time by a manual input device (32). By changing the entered rules, a user can adapt the call processor to a wide variety of applications without burdening the host (28) with operational details in real time. In particular, the behavior specifications represent choices among the ISDN data-channel messages and contents that the call processor (10) will forward to the host computer (28) in reporting receipt of those messages. The behavior specifications also represent choices for transmitted ISDN data-channel messages and contents generated by the call processor (10) either autonomously or in conjunction with the host computer (28).

Abstract: A special services add-on specifically adapted for use in a dial pulse activated telephone switching office such as a step-by-step office to enable the addition of various modern features thereto, thereby extending the economic life of the office. The add-on is a stored program, processor based system that can be put into service on a line-by-line basis independent of subscriber line assignments. Among the special services provided by the add-on are incoming call alert, call conferencing, call forwarding, tone dialing, abbreviated dialing, instant recall, restricted calling, ringback, delayed ringback and ring disable. Various of the services are remotely controllable by the subscriber by dialing programming instructions to the add-on either from his own or another telephone subset.