Wrap Capability for Synchronous Transmission Mode
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
The device shown in the drawing allows wrap tests to be performed for checking the synchronous link connecting a communication controller to a modem to resolve the field replaceable unit isolation problem when a default occurs on the link. In case of a synchronous link between the communication controller and a modem, the data exchanges are performed under control of clock signals provided by the modem and referenced by "Transmit clock" and " Receive clock". When the modem is disconnected from the link, the clock signals do not exist any more and the synchronous link cannot be tested by a wrap block. In that case, a clock signal is sent under control of a command activated by the test program.