Installation

Installing the HP AdvanceStack Internet Router

Preparing to Connect to a Network

Balanced drivers allow EIA/TIA-449 signals to travel greater distances than the EIA/TIA-232 signals. Table 2-4 lists the maximum speeds and distances for EIA/TIA-449, which are also valid for V.35, X.21, and EIA-530 signals.

Table 2-4. EIA/TIA-449, V.35, X.21, and EIA-530 Speed and Distance Limitations

Data Rate (Baud)

Distance (Feet)

Distance (Meters)

2400

4100

1250

4800

2050

625

9600

1025

312

19200

513

156

38400

256

78

56000

102

31

154400 (T1)

50

15

 

 

 

C A U T I O N

The EIA/TIA-449 and V.35 interfaces support data rates up to 2.048 Mbps.

 

Exceeding this maximum could result in loss of data and is not recommended.

 

 

Console and Auxiliary Port Considerations

All router models include an asynchronous serial console and auxiliary port. The console and auxiliary ports provide access to the router either locally (with a console terminal) or remotely (with a modem). This section discusses important cabling information to consider before connecting a console terminal (an ASCII terminal or PC running terminal emulation software) to the console port or modem to the auxiliary port.

The main difference between the console and auxiliary ports is that the auxiliary port supports hardware flow control and the console port does not. Flow control paces the transmission of data between sending device and a receiving device. Flow control ensures that the receiving device can absorb the data sent to it before the sending device sends more. When the buffers on the receiving device are full, a signal is sent to the sending device to suspend transmission until the data in the buffers has been processed. Because the auxiliary port supports flow control, it is ideally suited for use with the high- speed transmissions of a modem. Console terminals transmit at slower speeds than modems; therefore, the console port is ideally suited for use with console terminals.

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HP AdvanceStack Internet Router manual Console and Auxiliary Port Considerations, U T I O N