PEB (Pulse Code Modulation [PCM] Expansion Bus)
The PEB (Pulse Code Modulation [PCM] Expansion Bus) was introduced by Dialogic Corporation in 1989. It is a high-speed, digital, Time-Division Multiplexer (TDM) communication bus for the signal computing environment. PEB is similar in concept to a T-1 span; information is transmitted digitally and divided into several conversations. Each conversation is referred to as a timeslot, and the allocation of the timeslots determines the functionality of the bus.
The following applications are possible with PEB:
The PEB environment consists of two primary component types: network interfaces and resource modules. Network interfaces attach to the telephone network and generally control the speed of the bus (provides "clock"). Depending on the type of network interface, PEB can support from 24 to 30 simultaneous channels. For example, T-1 supports 24 data channels and E-1 supports 30 data channels.
Resource modules perform some type of signal computing function, such as fax, by transmitting on and/or receiving data from a designated range of timeslots.
With the PEB Switching Handler Libraries, fax resources are allocated at runtime, and connected to active/live telephone calls. You can also configure fax resources as "batch processing only," where jobs are created by the application, and submitted to the GDK Queue Management processing system. The PEB functions can be used with either the Batch Programming Model or the Interactive Programming Model.
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