Zhone Technologies Network Device Frame Relay and Internet Services Using IMACS’ Frad Server

Zhone Technologies, Inc. IMACS Product Book, Version 4

Multi-tenant Premises

X.25 PAD

Nx56/64

PBX/Key

System

Mainframe

IMACS

Service Provider

Central Office

PSTN

DS1/E1 DACS

Backup Link

Frame Relay

Network

Router

Nx56/64 or T1/E1

Figure 33—Frame Relay and Internet Services Using IMACS’ FRAD Server

IDSL Service Provisioning

An IMACS with a Frame Relay server can be used for efficient ISDN DSL (IDSL) provisioning for Internet access at speeds up to 128K. Each IMACS BRI card provides up to eight IDSL ports over single twisted pair wire. There can be up to seven such BRI cards in an IMACS800/900. This arrangement cost-effectively replaces external DDS CSU/DSU equipment and offers higher bandwidth.

Each Frame Relay server supports up to 35 NTUs at 128K over 1 T1 (with 3:1 concentration) or 1 E1 (with 2.5:1 concentration), thereby taking advantage of frame relay’s statistical multiplexing capabilities. Up to 64 DS0s are channelized through the Frame Relay Server ports and are concentrated onto a single port connected to the network. Three concentrator ports bring in additional NXDS0s channels to be concentrated onto the single outgoing port as shown in Figure 34.

March 2001 Page 84