The Comten 5620 supports any combination of IBM or NCR hosts and asynchronous, bisync and SDLC line protocols.
IBM bisync systems are now accessible to asynchronous ASCII terminals on the DCX network, thanks to a new option called Bluegate, which emulates an IBM 3271/3274 (model 2) cluster controller making asynchronous ASCII terminals look like IBM 3277/3278 (model 2) terminals.
Authorized terminals on the system can select the gateway and access the bisync environment.
Recently, the firm, which is a division of National Product Marketing, redesigned PC/Com to work with other popular printed-circuit boards that emulate 3270 terminals as well as SDLC and bisync terminal controllers, including boards from Forte and Quadram.
The Wellesley, Massachusetts firm's pcPATH and netPATH software operates in conjunction with a multi-function, dual-channel circuit card that plugs into a PC expansion slot to permit communications with SDLC or bisync protocols over leased and switched lines, the pcPATH products allow a variety of IBM-compatible personal computers to communicate with IBM hosts in SNA and bisync networking environments; the netPATH products permit 32 concurrent host communications sessions for all nodes on several popular LANs.
The initial products provide conversion from asynchronous ASCII to 3270 bisync and SNa operation, and 3270 de-conversion to asynchronous ASCII.
To overcome inherent delay problems, some users may be able to migrate their network to a protocol that is more immune to the effects of satellite delays than 3270 Bisync.
Total throughput can be increased by as much as 40 percent with the Bisync emulation feature due to bandwidth savings.
Bisync emulation removes non-productive polling traffic from the communications lines and handles all poll/select requests and acknowledgements locally.
The Bisync emulation feature contines to provide all the error-control correction and diagnostics available on all standard IBM 3270 Bisync systems.
The Bisync emulation feature controls the flow in a Bisync environment and cuts down on the overhead.