Table of Contents
Advertisement
U-90E Data/Fax Modem
The U-90E will have the TST LED On during the test. This test can be initiated by the local
modem when the modems are on-line.
13.2.4 Remote Digital Loopback Test (AT&T6)
This test will request the remote modem to do a digital loopback. During testing, the local
modem will send a remote digital loopback request to the remote modem according to
V.54. If the remote modem supports V.54 and is programmed to grant this kind of request,
it will resend all the received data back to the local modem, and the local terminal or
computer will receive all the data it sends out. This test is applicable when the remote
modem and local modem both provide V.54 Remote Digital Loopback capability.
The U-90E will have the TST LED indicator ON during the test. This test can be initiated
by either modem when the modems are on-line.
13.2.5 Remote Digital Loopback with Self-test (AT&T7)
This test generates data from the modem itself instead of input data from the RS-232
interface. The data will go through the same path as it would with the Remote Digital
Loopback Test. In asynchronous mode, the pattern consists of printable ASCII characters.
The U-90E will have the TST LED On during the test. This test is applicable when the
remote and the local modem both provide V.54 Remote Digital Loopback capability. This
test can be initiated by either modem when the modems are on-line.
13.3 Line Condition Report (AT#E1)
You can monitor the line conditions: Signal to noise ratio (SNR), Received power Level
(RXL), Retrains Granted (RTG), Retrains Requested (RTR), FRN (Fast Retrain) Granted
(FTG) and Fast Retrain Requested (FTR), when the modem is on-line (in the command
AT#E1
state), by using the
command.
Diagnostics
13-3
Advertisement
Table of Contents
