Multi-Tech Systems DT101/xx, DT102/xx Configuration 3 LAN to LAN, Ethernet Concentrator

DataTalker Owner’s Manual

2.4 Configuration 3 - LAN to LAN

Configuration 3 is an example of a pair of DataTalkers providing the link between two LANs with the added benefit of voice or fax traffic over the same composite link. Bridging the LANs over a single high speed composite link expands the capacity of each LAN. The LAN bridge on each LAN is provided by a router/bridge with a synchronous interface connected to the DataTalker’s data channel. The composite link could be an internal ISDN terminal adapter, an internal 56K DSU, or one of a variety of external high speed link devices up to fractional T1 devices. The additional feature provided by the DataTalkers is free voice or fax traffic without the need to establish a separate voice connection between the two LANs.

Ethernet

Concentrator

LAN PC	Communications
	Server

Sync Data

Channel

LAN PC

File Server

LAN PC Router/Bridge

DataTalker

Printer Print Server

	Trunk
	Trunk
PSTN	Trunk
	Station
	Station

PBX

LAN 1

Ethernet

Concentrator

Composite Link		Sync Data
		Channel
PDN
		Router/Bridge	LAN PC
	DataTalker
Voice/Fax	Voice/Fax	Communications	LAN PC
Channel		Server
	Channel
		LAN PC
		File Server
		Telephone
		Print Server	Printer

Telephone

LAN 2

Figure 2-3. LAN to LAN Configuration

In the configuration shown in Figure 2-3, the voice/fax channel 1 FXO port on the DataTalker at LAN 1 is connected to a station card on the local PBX, and the voice/fax channel 1 FXS port on the DataTalker at LAN 2 is connected to a telephone. On both ends, the data channel of the DataTalker is connected to the router’s synchronous port, and the router’s Ethernet port is connected to the Ethernet concentrator. An RJ-48 telephone cable connected to the composite link at the DataTalker’s DSU/TA DIGITAL connector links the DataTalker’s internal DSU to the public data network.

You must configure the DataTalkers before you connect them to the LANs. To configure a DataTalker, place DIP switch position 3 in the down (closed) position and connect a command port device such as a terminal or a PC to the DATA/COMMAND connector on the back of the DataTalker. Turn on the DataTalker and PC and run your communications software in terminal mode. (Set it for direct connection at a serial port speed of 19,200 bps or slower.) Press the ENTER key to establish communications with DataTalker and bring up the Main Menu.

A series of configuration menus provides simple and complete configuration information for each aspect of the DataTalker. From the Main Menu, you can configure the unit, display statistics, reset various functions within the DataTalker, and run diagnostic tests:

Main Menu

1 - Configurations

2 - Statistics

3 - Reset Options

4 - Diagnostics

5 - Exit Command Mode

6 - QUICK SETUP

Selection : _

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