ADTRAN T1-FT1 user manual Application, 511

Chapter 1. Introduction

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 as previously described, an end to end integrity check can be made on the DTE ports.

1 in 8

The 1:8 pattern is used similarly to the 3:24. Each channel of the T1 has only one bit set.

Application

Using the V.35 DTE interface, a bridge or router can be interfaced to the network. 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. See Figure 1-9.

Bridge Router	TSU	TSU	NX56/64	Bridge Router
NX56/64
V.35		(Public T1)	V.35

Figure 1-9. Simple Bridge Application on a T1 or FT1 Circuit

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