Dual-Port Serial with ISDN BRI Chassis

The J2300 Dual-Port Serial with ISDN BRI chassis has two Fast Ethernet LAN ports, two serial WAN ports, and one ISDN BRI U (Figure 16) or S/T (Figure 17) port. The ISDN BRI interface is the backup interface to the primary serial interface and provides failover support for a serial connection.

The serial with ISDN BRI S/T or U interface chassis provides the following key features:

• Onboard network processor
• Autoselection of operation modes based on data terminal equipment (DTE) or data communication equipment (DCE) cables
• Local and remote loopback diagnostics
• Configurable clock rate for the transmit (Tx) clock and receive (Rx) clock
• Bandwidth on demand
• Dial backup
• Dial-on-demand routing backup

For pinouts of cable connectors for the network ports, see Network Cable Specifications and Connector Pinouts.

For alarms, see configuring and monitoring alarms information in the J-series Services Router Administration Guide.

Table 17 describes the meaning of the LEDs for a Fast Ethernet port, Table 19 describes the meaning of the status LED for a serial port, and Table 20 describes the meaning of the status LED for an ISDN BRI port.

Table 19: Status LED for Serial Ports

Table 20: Status LED for ISDN BRI Port