User's Manual

USING INTERNAL MENU COMMANDS

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234839, Revision 2.2

*** Advanced Functions Menu ***

Main Port: Packet Timers: OutPut = Disabled, Input = Disabled

Main Port: Rx Buffer Limit = 1024

(T) Tx (Out) Packetiser Timer

(R) Rx (In) Packetiser Timer

(L) Rx Buffer Limit

(Esc) Previous Menu

Enter Choice:

Figure 6-20 Advanced Functions Menu

(T) Tx (Out) Packetiser Timer

This selection allows a Packet timer value to be set. The modem will send a bundled packet of

information out through the serial Tx port when no data has been received for this period of time.

To change the Tx (Out) Packetiser Timer value, press (T). The following will be displayed:

Tx (Out) Packetiser Timer requires a timer value or 0 to disable

Enter Timer value in milliseconds (0-1000): 0

The value can range from 0 to 1000ms. It is 0ms by default and corresponds to disabled

(R) Rx (In) Packetiser Timer

The Rx Packetiser prevents data from being sent to the remote modem until the timeout period has

expired. Each character received on the Rx serial input resets this timer. This clumps the data together

in the buffers so that each RF frame buffer is completely filled. It helps protocols such as MODBUS

because they cannot tolerate inter-character delays. It can also help reduce latencies and increase

efficiency of slow frame rates.

To change the Rx (In) Packetiser Timer value, press (R). The following will be displayed:

Rx (In) Packetiser Timer requires a timer value or 0 to disable

Enter Timer value in milliseconds (0-1000): 0

The value can range from 0 to 1000ms. It is 0ms by default and corresponds to disabled

(L) Rx Buffer Limit

The Rx Buffer Limit allows you to control how full the internal buffer should get before it triggers the

flow control. Depending on the size of the packets of data being sent to modem, certain values of the

Buffer Limit might improve the modem’s performance when dealing with data from the serial ports.

To change the Rx Buffer Limit value, press (R). The following will be displayed:

Enter Rx Buffer Limit (16-1024): 1024

The value can range from 16 to 1024 bytes. It is 1024 bytes by default.