Modifying Serial Interface Parameters - H3C S3600 Series Installation Manual

method. After the negotiation, the sending program starts to transmit data packets. When receiving a
complete packet, the receiving program checks the packet using the agreed method.
If the check succeeds, the receiving program sends an acknowledgement character and the
sending program proceeds to send another packet.
If the check fails, the receiving program sends a negative acknowledgement character and then the
sending program retransmits the packet.

Modifying Serial Interface Parameters

In actual applications, you need to make the serial interface baud rate higher to save updating time or
make it lower to guarantee transmission reliability. This section introduces how to adjust the serial
interface baud rate.
Enter the main menu and select 2 to enter the serial interface sub-menu, and then select 5 on the
sub-menu to modify the baud rate. The system displays the following:
============================<BAUDRATE SET>============================
|Note:'*'indicates the current baudrate
| Change The HyperTerminal's Baudrate Accordingly
| Press 'Enter' to exit with things untouched.
|-----------------------<Baudrate Available>-------------------------|
|<1> 9600(Default) *
|<2> 19200
|<3> 38400
|<4> 57600
|<5> 115200
|<0> Exit
======================================================================
Enter your Choice(0-5):
Select a proper baud rate. For example, select 5 for a baud rate of 115200 bps and the system displays
the following information:
Baudrate has been changed to 115200 bps.
Please change the terminal's baudrate to 115200 bps, press ENTER when ready.
At this time, the baud rate of the serial interface of the switch is modified to 115200 bps, while that of the
terminal is still 9600 bps. The switch and the terminal cannot communicate with each other. Therefore,
you need to make the baud rate on the terminal consistent with that on the switch.
Perform the following operations on the terminal:
Figure 5-2 Disconnect the terminal
Select File > Properties, and then click Configure... to change the bits per second to 115,200.
5-10
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