Verilink M1-3 (880-503136-001) Product Manual Instrukcja Użytkownika Pobierz pdf (Strona 66)

M1-3 Diagnostics

5-10 Verilink M1-3 User Manual

down code (001) for the same time period. In ESF mode, the line

loopback is also activated and deactivated by sending bit-oriented

messages through the ESF Facility Data Link.

Figure 5-16 T1 Line Loopback

T1 FEAC Far End

Loopback

When a T1 far-end line loopback is activated, the data received

from the network is transmitted back toward the near end. The

looped signal passes through the M1-3 repeater so that the line

loopback can be used to test the circuit from the near-end M1-3 or

telephone company (Figure 5-17).

Figure 5-17 T1 Far End Loopback

The M1-3 sends the network signal or AIS to the equipment,

depending on how the M1-3 is configured.

To activate a far -end line loopback for a T1, do the following:

1. From the M1-3 Loopback Selection Menu, type “F” and press

E

NTER

then type “A” (Figure 5-14).

M1-3

M1-3

Near End

Far End

1of28T1’s

T3

M1-3

M1-3

Near End

Far End

1of28T1’s

T3

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 74 75

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