Motorola V3229 Operating Instructions - Page 232

Test Procedures The local modem receiver connects to its transmitter so received data is digitally processed and retransmitted to the remote site. If Digital Bilateral Loopback is enabled locally, the local DTE is looped back to itself (Figure C-5). If disabled, the local DTE receives a constant mark. Remote Digital Loop The initiating modem signals the remote modem to enter Digital Loopback. The remote modem receives the data, digitally processes it, and retransmits the data back to the local modem. If Digital Bilateral Loopback is enabled, the remote DTE is looped back to itself (Figure C-6). Test Pattern In Test Pattern, transmit data from the local DTE is blocked and replaced by a V.52 compatible test pattern. When the modem transmits the test pattern, it expects to receive the same pattern. The V.52 test pattern error detector is enabled and indicates received errors by the TEST PATTERN ERRORS display. With Test Pattern -J V.3229 / V.3229L