CTL Lx-Lite VoiceSupport - Manual (Page 27)

Serial Communications Ports
VoiceSupport LX System Guide 2-13
Chapter 2 Installation and Setup
■ Parity - A parity check is the Voice Mail process for detecting if any data bits
have been altered during transmission. When the transmitting device frames
a word (byte), it counts either the number of 0’s or 1’s in the data bits and
then adds a parity bit that corresponds to whether or not the count of the
data bits was even or odd. The receiving device also counts the data bit 0’s
or 1’s as it receives them and then compares its computation to the parity
bit. If a transmission error is detected, a flag can be set and retransmission
may be requested.
If you set Parity to No, no parity check will be performed.
If you set Parity to Even, the parity bit will be set at 0 if the number of 1s in
the data bits is even and set to 1 if the number of 1s is odd.
If you set Parity to Odd, the parity bit will be set at 1 if the number of 1s in
the data bits is even and set to 0 if the number of 1s is odd.
■ Stop Bits - the number of bits placed at the end of each transmitted word
(byte) by the sending device. This number of bits indicates to the receiving
device that the word has been transmitted.
1 bit (default)
2 bits
■ Word Length - the number of bits in a transmitted word or byte.
5
6
6
7
8 (default)
■ RTS/CTS - a protocol that regulates the flow of data between a computer
and a serial device by means of the CTS and RTS signals between them.
CTS signals a Clear To Send. RTS signals a Request To Send.
No - disabled (default)
Yes - enabled
■ Xon/Xoff - a protocol that regulates the flow of data between a computer
and a serial device by means of the XON and XOFF signals from the
receiving device to the sending device:
The XON signal means: Turn on the computer and start sending data.
The XOFF signal means: Turn off the computer and stop sending data.
No - disabled (default)
Yes - enabled
■ Data Link - N/A
4) When you have finished making changes on this dialog box, click the Apply
changes button.