Abstract: The subject invention relates to an integrated electronic assembly comprising a power supply and as associated electronics unit powered thereby. The integral power supply housing is pivotal with respect to the electronics unit housing. Protruding from the power supply is a plug (pair of prongs) for insertion directly into a standard electrical outlet to permit the entire assembly to be physically supported thereby. A detent is provided for holding the power supply at predetermined orientations with respect to the electronics unit. Electrical connections are maintained between the power supply and the electronics unit while they are pivoted at various orientations with respect to each other.

Abstract: The present invention relates to a modem that allows the user to switch back and forth between voice and data telecommunications during the same phone call without redialing. Such switching back and forth between voice and data telecommunications is accomplished by lifting the telephone handset for voice communications and replacing the telephone handset for resumption of data communications. The present invention also allows a local user to communicate with a remote user via a speaker at the remote modem location without the remote user picking up the remote handset.

Abstract: A character base input data stream is encoded in compressed form by using a histogram of a sample of the data stream to determine the frequency of appearance of characters in the stream. A code for a character M+1 is generated in an encoder (112) to be of a length which is an inverse function of the frequency of appearance of character M+1 in the preceding M characters in the sample. Decoding can be achieved by forming a comparable sample window in a decoder (118) to which is applied an estimated index of the incoming character being decoded.

Abstract: A direct access coupler for connecting a piece of terminal equipment, such as a modem to a telephone line pair, the coupler being of reduced size achieved in part by the use of a miniaturized isolation transformer and a constant current circuit to divert the off-hook current which would otherwise flow through the isolation transformer or a current-shunting choke and by the use of both an optical isolator off-hook circuit and an optical isolator ring detector circuit.

Abstract: The shroud has a general frustum-like configuration to provide a central opening through which the chair pedestal extends and to enable the interior surface of the shroud to seat firmly on the chair legs, and when so seated to collectively conceal all of the chair legs. The shroud is made of a compressible resilient plastic of sufficient rigidity to withstand substantial forces applied to those portions of the shroud spanning the areas between the chair legs. Provided on the interior of the shroud are locking means adapted to interengage in locking relation and preferably with a snap action with each leg of the chair.