ADTRAN 1202060L2-1, Руководство пользователя

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Chapter 1. Introduction
1202060L2-1 TSU LT User Manual 1-11
Pattern Generation
The TSU LT offers four available test patterns: 511, 1:8, All
Ones, and All Zeros.
Bridge/Router Application
A bridge or router can be interfaced to the network by using
the V.35 DTE interface. The bandwidth used is
programmable at Nx56 or Nx64 data rates for T1 or FT1
service. The bandwidth can be selected as contiguous or
alternate. Figure 1-6 shows a simple bridge application.
Figure 1-6. Simple Bridge Application on a T1 or FT1 Circuit
511 The 511 pattern is generated and checked by the
Nx56K/64K serial interface. It only appears in
the DS0s assigned to the Nx56K/64K port.
When used in conjunction with the payload
loopback at the far end, an end-to-end integrity
check can be made on the DTE ports
1:8
The 1:8 is a stress pattern which places the max-
imum number of 0s in the transmitted data.
This is always done over all DS0s.
This pattern is used in conjunction with external
test equipment to determine if the T1 line is per-
forming acceptably under a stress condition.
Each channel of the T1 has only one bit set.
All Zeros Generates an all zeros pattern in every channel.
All Ones
Generates an all ones pattern in every channel.