Epson ActionNote 880C User Manual - Fax/Data Modem - Page 67

Local Digital Loopback

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Escape command Result code: Command: Result: Test result: Result code: +++ (return the modem to the on-line command state) OK AT\N1 ATS18=60&T3 cursor shifts down one line (test starts) 000 (timer expires and no errors were found) OK 4.5 Local Digital Loopback Local digital loopback checks the integrity of the remote modem and the phone line if the remote user suspects either to be the cause of transmission errors. During this test the modem loops data internally sent from the remote modem back to the remote modem as shown in Figure 4-5, During the test, data is not received by the local personal computer. Local digital loopback is useful when a remote modem is unable to request a remote digital loopback. 60 TESTING - 4

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Escape command
+++
(return the modem to the on-line com-
mand state)
Result code:
OK
Command:
AT\N1 <CR>
ATS18=60&T3<CR>
Result:
cursor shifts down one line
(test starts)
Test result:
000
(timer expires and no errors were found)
Result code:
OK
4.5 Local Digital Loopback
Local digital loopback checks the integrity of the remote modem and the phone line
if the remote user suspects either to be the cause of transmission errors.
During this test the modem loops data internally sent from the remote modem back
to the remote modem as shown in Figure 4-5, During the test, data is not received
by the local personal computer. Local digital loopback is useful when a remote modem is
unable to request a remote digital loopback.
60
TESTING - 4