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Configuring the Nortel Networks Remote Access Concentrators and the DMS-10 for Remote Access.March 31, 1999 9

FIGURE 5. IP pools

5.4 DMS-10 Setup Introduction

The preferred method of interfacing to a RAC is using ISDN PRI for the WAN interface.

PRI allows a 64KB channel to interface to the RAC. Additionally, using PRI allows pro-

vides much quicker call setup since PRI uses the D channel signalling. If PRI cannot be

deployed, normal T1 trunking can be used for the interface. The only significant limitation

will be that the connection bandwidth will be limited to 56Kbs. ISDN calls will still termi-

nate to the RAC and MLPP is also supported with both interfaces. MLPP is only sup-

ported on ISDN originating calls. If you will be using standard T1 trunking and have

customers using BRI ISDN, make sure your customer base is aware of the 56Kbs limita-

tion. Using 56Kbs limits the number of ISDN terminal adapters available. Not all vendors

support ISDN at 56Kbs.

Setting up either PRI or T1 trunking are quite similar. In each case a Trunk Group will

need to be defined, a Route will need to be setup and the number for your RAC will need

to be intercepted or translated.

5.4.1 T1 Trunk TG setup

The trunk setup for normal inband trunks is straight forward. The RAC does not require

any directory number to be sent to the unit. It is recommended that no numbers be deliv-

ered to the RAC.

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Bay Networks Remote Annex Manual de usuario Pagina 9