Black Box 32144, Manual

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CHAPTER 7: Diagnostics
7.9 Remote Modem Diagnostics
The modem is capable of
performing two tests on compatible
remote modems: remote digital
loopback (RDL) and remote digital
loopback self-test (RDLST). If a
problem is encountered and the
local modem passes all diagnostic
tests, the local modem can test the
remote modem.
There are two (noncontiguous)
REMOTE TEST screens on the
modem LCD: (1) The remote tests
are initiated from the REMOTE
TEST menu. (Select RMT from
MAIN MENU screen 2, and then
select TEST. Then select the test
type.) (2) A remote test cannot
be initiated unless the Remote Test
option is enabled on the remote
modem. This option (also
REMOTE TEST on the LCD) is
accessed via SETUP screen 4.
7.9.1 R
EMOTE
D
IGITAL
L
OOPBACK
(RDL) T
EST
The RDL test ( Fig. 7-6 ) allows
testing of the local modem, remote
modem and telephone line from
the local site.
In Hayes mode only, the RDL
test can be initiated using the
command &T6 (preceded by AT).
In any mode, the RDL test can be
initiated from the modem’s front
panel, as follows:
Both modems should be on-line
and should be tested at the data
rate used by the DTE. Ensure that
the DTR circuit is on. (If TR is
present on the EIA status screen,
the DTR circuit is on.)
From screen 2 of the MAIN
MENU, select RMT, and then select
TEST. From the REMOTE TEST
menu, select RDL.