3-114 Customer Programming Software (CPS)
6866537D87-F Chapter 3 - MTM800 Product Information Manual September 2008
26.5.2 Parity Bit
Determines whether an optional Parity Bit is used on serial communication between DTE (e.g.
computer) and DCE (i.e. this TETRA terminal).
The parity bit indicates whether the number of 1 bits in the preceding data was even or odd. If a
single bit is changed in transmission, the message will change parity and error can be detected at
this point. This bit is meant for simple error checking.
There are 4 parity schemes available:
•PARITY_ODD - asserts or un-asserts a parity bit to set the total number of 1 bits to be odd in
the data.
• PARITY_EVEN - asserts or un-asserts a parity bit to set the total number of 1 bits to be even
in the data.
•PARITY_MARK - asserts a parity bit in the data. The parity scheme is programmed to odd.
• PARITY_SPACE - un-asserts the parity bit in the data.
The option chosen here will be the default value at radio power-up.
To select the option, put the pointer into the field value, click on the arrow, and drag the pointer to
the desired option.
27 TNP1 Support
The TETRA Network Protocol type 1 (TNP1) allows the user of a Terminal Equipment (such as a
PC) to control TETRA services at the Mobile Terminal via the TETRA Peripheral Equipment
Interface (PEI).
The TETRA services include: Mobility Management, Call Control, Short Data Service (SDS), and
Supplementary Services. In addition, there are commands to access the MT2 configuration and
storage parameters.
To handle the TNP1 interface, the TNP1 application must run on TE2.
The TE2 has to be connected via the RS232 serial communication cable and its application has to
be registered on the MT2.
SDS is available to the TNP1 application running on TE2. The TE2 application can access SDS via
AT commands, or TNP1 on UDP/PPP protocol. This means either AT commands or UDP/PPP, not
both at the same time.
The following menu options are used to configure the terminal’s configuration for TETRA Network
Protocol type 1 (TNP1) Support:
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