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Vmux-2100 Installation and Operation Manual Chapter 6 Diagnostics
Loopback Tests 6-3
6.2 Loopback Tests
Vmux-2100 supports activation of the local and remote loopbacks. The purpose of
these tests is to determine the source of a break in the data flow. The loopbacks
are activated per E1/T1 port.
Local Loopback
Vmux-2100 can activate a local loopback to test the connection between the
E1/T1 voice port and the local side PBX. In this mode, data coming from the PBX
side is looped back (to the testing equipment). See Figure 6-4.
Main Module
Main Link
Testi ng
Equipment
Operating in
Internal Clock
E1/T1
Voice Module
Framer
Figure 6-4. Local Loopback
To activate an local loopback:
1. Configure the testing equipment to internal clock.
2. From the Diagnostics menu, choose Local Loop Test.
The Local Loop Test menu appears (see Figure 6-5).
Local Loop Test
1. Slot > (Slot 1)
2. Port > (Port 1)
3. Activate
@ - Db Update; # - Db Undo
ESC-prev.menu; !-main menu; &-exit
Figure 6-5. Local Loop Test Menu
3. From the Local Loop Test menu, perform the following steps to complete the
local loopback activation:
Select a desired slot.
Select a desired port.
Activate the local loopback by choosing Activate, and then selecting Yes
from the displayed menu.