2.9 Configuration 8
Configuration 8 is a LAN to LAN configuration with two MultiMux MMV1608C/56/V multiplexers with a single composite link. The muxes are connecting two local area networks (LANs) through the Sync Data Channel, connecting a communications server on one LAN to a minicomputer at a remote site and connecting voice/fax communications between the two locations. The LAN to LAN configuration is shown in Figure
This configuration has the two LANs bridged together using bridges connected through the Sync Data Channel, the async channels of communications server on one LAN are connected to a minicomputer at the other LAN, and voice/ fax communications is provided between the LANs. The external bridges are connected to the COMPOSITE LINK B RS232C/V.35 connector on the back panel of both MultiMuxes, the async channels of the communications server are tied through the CHANNEL connectors to the minicomputer at the other end, and the VOICE/FAX CHANNEL 1and/or 2 E&M connector(s) on the back panel of both multiplexers are connected to a PBX E&M trunk. The muxes are configured so that the COMPOSITE LINK B RS232 connector is the synchronous data port.
Ethernet |
| Ethernet |
Concentrator |
| Concentrator |
| Composite Link |
|
SDLC Sync |
| SDLC Sync |
Channel | PDN | Channel |
LAN PC
Bridge
Async
Channels
LAN PC
Communications
ServerPSTN
LAN PC
File Server
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| Digital Line |
| LAN PC |
Multiplexer | Multiplexer | Bridge | ||
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Voice/Fax Channel |
| Voice/Fax Channel |
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| LAN PC |
Trunk |
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| Trunk | LAN PC |
Trunk |
| PSTN | Trunk |
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Trunk |
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| Trunk |
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Station |
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| Station |
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Station |
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| Station |
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| LAN PC | |
PBX | Telephone |
| PBX | |
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| Telephone | File Server |
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| Async |
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| Channels |
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Printer | Print Server | Minicomputer | Print Server | Printer |
Figure 2-8. Configuration 8 (LAN to LAN)
The bridging of the two LANs is provided by the synchronous connection between the two LAN bridges. This allows any LAN pc on one LAN to communicate with any LAN pc on the other LAN. The async channels of the communications server on one LAN are connected to a minicomputer at the other LAN. In this configuration, the voice/ fax communications are set up per configuration 5.
To configure the Sync Data Channel, the $MUXBSYNC command sets Composite Link B for sync data. The parameters for the default configuration of Port A and Port B can be displayed by entering $L command. The default configuration for Port A and Port B is shown in the example below.
CONFIGURATION OF PORT A: COMPOSITE LINK
DSU TYPE | SPEED | CLOCKING | LOOPBACK |
EXTERNAL | 56K | INTERNAL | OFF |
CONFIGURATION OF PORT B: SYNC DATA | |||
PROTOCOL | SPEED | CLOCKING | LOOPBACK |
ANY SDLC | 56K | INTERNAL | OFF |
