Verilink M1-3 (880-503136-001) Product Manual Manual de usuario descargar pdf (Pagina 63)

M1-3 Diagnostics

Verilink M1-3 User Manual 5-7

Figure 5-10 DS3 FEAC Far-End Loopback

DS3 Inband Far-

End Loopback

The DS3 Inband Far-End Loopback uses the same loopback codes as

the DS3 FEAC Far End Loopback. Different overhead bits are used

to transmit the loopback request. This is a proprietary loop-up

method which prevents equipment within the telco cloud from

interfering with the loop-up codes. Both ends of the circuit must

have Verilink M1-3s and have inband enabled in the

Configuration

. (Figure 5-11).

Figure 5-11 DS3 Inband Far-End Loopback

M1-3 T1

Loopbacks

There are three ways to loopback the 28 T1 ports at the M1-3

midplane access point:

•

Local loopback,

•

Line loopback and

•

Far-end loopback.

Each of these loopbacks can be activated and deactivated for

individual T1s or all 28 T1s. These loopbacks are described in the

following section with corresponding menu options.

T1 Loopback

Types

The

M1-3 Loopback Selection Menu

(Figure 5-6) displays the T1

loopback options. Select the desired loopback type and press

NTER

The

T1 Loopback Options Menu

displays for that loopback.

For example, Figure 5-12 shows the

Far End Loopback Options

. The T1 loopback options for all three T1 loopbacks are the

same as those in Figure 5-12.

M1-3

Near End

Far End

M1-3

Near End

Far End

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Verilink M1-3 (880-503136-001) Product Manual Manual de usuario Pagina 63

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