ADTRAN MX2800 M13 Manual de usuario descargar pdf (Pagina 54)

MX2800 M13 Multiplexer User Manual

3-12 61200290L1-1H

• NIU is used to cause the channel to loop up or loop down when it receives an NIU loop-up

or loop-down pattern for more than 5 seconds.

Select Set Multiple

to set a contiguous group or all of the T1/E1s to the same value at the

same time. Refer to “Set Multiple” on page 3-9 for a description of the

Set Multiple option.

T1/E1 Circuit Protection

T1/E1 Circuit Protection determines which circuit is allowed to initiate a protection switch if a

failure in the circuitry for that channel is detected. See Figure 3-10. If a T1/E1 is set to

Disabled, the failure of the circuitry of that one channel does not cause a protection switch. If

set to

Enabled, the failure of a channel causes a protection switch to occur if the Protection

Threshold setting in this menu is exceeded.

Figure 3-10. Circuit Protection Menu

The Protection Threshold setting determines how many of the

Enabled lines must fail before a

card switch occurs. If the failure of a single protected (enabled) line is to cause a card switch,

set the

Protection Threshold to 1. Choices include 1 through 28.

Select Set Multiple to set a contiguous group or all of the T1/E1s to the same value at the

same time. Refer to “Set Multiple” on page 3-9 for a description of the

Set Multiple selection.

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ADTRAN MX2800 M13 Manual de usuario Pagina 54