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Netopia R5300 for Dedicated Access T1 Service
Routing with Netopia R5300 for Dedicated Access T1 Service
Requirements
Most customer requirements are driven by the interfaces available on the Netopia R5300 router. The diagram below illustrates the back of the Netopia R5300:
Configuration and Management
The application in the diagram below illustrates the T1 Dedicated Access service. An emergency backup system is also included in the application. The emergency backup system may not apply to all T1 Dedicated Access customers.
- The Netopia R5300 interfaces the dedicated T1 line via an internal T1 CSU/DSU. The internal CSU/DSU will support 1-24 DS0 channels.
- The Layer 2 protocol between the frame relay switch and the customer router is frame relay.
- A single static DLCI needs to be configured into the Netopia router.
- One PVC switches all traffic coming and going from the CPE device to the POP IP router(from the CPE) to the POP IP router.
- The Netopia R5300 interfaces the modem in the above diagram via an auxiliary port. The Netopia R5300 can be configured to utilize the auxiliary port as a backup interface to accommodate for a loss of layer 1 on the T1 interface. The Netopia will initiate a PPP connection via the modem due to the backup interface configuration. The call comes in to the POP via a PRI to the access server. When the PPP connection is established with the access server, the IP traffic will then be routed to the IP router via Ethernet. Dynamic routing protocols will need to be engineered to accommodate for this change.
- Diagram 1 illustrates the frame relay switch and the access server in the same POP. This is not a requirement. The access server and the frame relay switch could very well be in different POPs. Of course, there may be limitations based on the routing policies.
- The Netopia R5300 uses the IP address of the IP router as its default gateway. A second default gateway with a lower preference is added when an emergency backup system is in place
- The Netopia R5300 comes with a cable to go from Telco port 1 (the port on the right above) to the demarc. The T1 demarc must be in 8 pin form (RJ48).
- For configuration, a DB9-DB9 console cable ships with the Netopia. This console cable is female at both ends. The cable also contains a Macintosh serial connector
- The power supply that ships with the Netopia R5300 requires a 120VAC outlet.
Lan Connectivity
- LAN connectivity requires a 10BT RJ45 connection.
- There is an 8 port HUB on the back of the Netopia R5300. Port 1 can be used to connect directly to a PC or to another hub.
- When connecting directly to a PC or another HUB, use a straight through Ethernet cable and set the Normal/Uplink button to Uplink.
- Ethernet Hookup Diagrams:
Backup Interface
- An external modem with an RS-232 interface is required, but is not included with the Netopia R5300. The backup connection requires a proprietary Netopia cable. This cable is supplied with the Netopia R5300.
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