Black-box 5000 User Manual download pdf (Page 174)

Multiserver 5000

172

This menu offers the following test options:

Option Description

Sync Causes a sync port to be placed in

Channel local echo loopback similar to the

Loopback async echo.

WARNING: This test will interrupt

all channels connected across the

link.

Remote Sets up the unit to expect its own

Composite databack. This function is required

Loopback for tests intiated by external

communication devices (modem or

CSU/DSU) or telco.

WARNING: This test will interrupt

all channels connected across the

link.

LED Test Lights all of the indicator lights

(LEDs) on all modules for five

seconds.

Monitor Ch. CCM indicator lights display the

Interface status of the interface signals. See

Signals Figure 13.4.

Terminate Terminates all tests initiated at this

Test menu (except LED Test, which

automatically terminates).

Once a test is initiated, an [Active] message is

displayed on the LCD. All tests (except the LED

Test) remain active until terminated with Terminate

Test. The next time you cycle through the LCD

Menus, an [Active] message is displayed,

meaning the test was previously invoked and is still

active. When a test is complete or is terminated, the

LCD will display [Inactive].

OICE/FAX

When this menu is selected, the screen will prompt

for the channel number to be tested. If a voice/fax

module is installed in the Multiserver, the following

diagnostic options will be offerred:

Option Description

Self-Test Verifies that the memory and analog

circuit of the voice/fax channel is

working properly. When this test is

initiated, the display will read

[Started]. Press the EXEcute key

again to ascertain the status of the

test (Passing/Failing).

Local Loop Causes the voice/fax channel to

compress the local speech signal,

and then passes this signal through

the reconstruction process back to

the local receiver. It sets the

voice/fax channel to the off-hook

condition during the test. When this

test is initiated, the display will read

[Active].

Input Level Monitors the level of the incoming

A6 A5 A4 A3 A2 A1AT BO

Figure 13.4 “Monitor Channel Interface Signals” Test.

Pin 11*

*Not used on links.

CD DSR RI CTSRTS DTR Busy*

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