Appeal 2007-2258
Application 09/738,054
provide the conductive paths of a computer local area network (LAN). (Col.
7, ll. 16-35).
3. As shown in Figure 1a of Goodman, transceiver/switch 400 is
installed interposing between the two ends of each pair 405. One segment of
each pair remains connected to trunk 476’ while the other end to individual
local networks 411a-411e, which are wirings confined to structures such as a
house, an apartment, or a room in an office (col. 11, ll. 1-11). Thus, twisted
pairs 476’ and their associated extended pairs 405 ordinarily constitute an
uninterrupted connection between local networks 411 and local telephone
exchange 475 (col. 11, ll. 34-39). Transceiver/switch 400 connects to line
402 to receive and transmit signals which are processed and switched onto
selected ones of extended wire pairs 405 leading to local networks 411,
together with (and without interfering with) the telephone signals (e.g., voice
signals) that also use those wires. The switched signals are received by the
RF communication devices connected to local networks 411 (col. 11. ll.
52-59).
4. Chau provides voice calls between multimedia workstations of
a LAN-based client-server multimedia communications system and
telephones of a telephone system by an interface that comprises a pair of
ISDN ports interconnected by an ISDN link and that transfers ISDN control
signals and user communications between the LAN and the telephone
switching fabric (Abstract).
5. The system of Chau, shown in Figure 1, is made up of two
communications subsystems 11 and 12 that are interconnected by a
4
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