ADTRAN 1204006L1 Manuel d'utilisateur télécharger pdf (Page 71)

Chapter 5. Applications

61200208L1-1 Express 5210 User Manual 5-13

Figure 5-7. PLAR Mode Application

Direct Mode Application

Direct mode is used to set up a typical FXS/FXO extension

arrangement. In this mode, the local unit is connected to a PBX via

an FXO module. The remote unit uses an FXS module to connect

the telephone sets. In this arrangement, the local PBX extensions

are extended across the frame relay or point-to-point DDS circuit.

In direct mode, the Express 5210 is transparent to the telephone

circuit. All signalling information is generated/detected by the

attached PBX/telephone.

For direct mode, the DLCI for each voice port must be pro-

grammed. In the case of a frame relay circuit, this is the local DLCI

that the voice data is to be carried on. For a point-to-point DDS cir-

cuit, the DLCI value must be non-zero and it must be the same on

both ends of the circuit. See Figure 5-8.

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ADTRAN 1204006L1 Manuel d'utilisateur Page 71