3-120 Customer Programming Software (CPS)
6866588D21-D Chapter 3 - MTP850 Ex/MTP810 Ex Product Information Manual March 2009
26.4.11 Buffer Full, Overwrite Policy
As the terminal receives status messages, its buffer will eventually fill if messages are not deleted.
This feature has the following options:
• None - If this option is selected, the terminal will not buffer any more received status 
messages once it is full.
• Overwrite Old + New - Selecting this option allows the terminal to overwrite any buffered 
status message when the buffer is full.
• Overwrite only Old - Selecting this option allows the terminal to overwrite only the oldest 
buffered status message, when the buffer is full.
26.4.12 DTR Link Down Indication Time
When the terminal is in data mode, this is the time after which it will indicate, to the user, that the 
down link has been lost.
The range of this timer is 0 to 255 seconds.
26.4.13 PI for Concatenated Messages
The Protocol Identifier (PI) is the information element the MS uses when receiving text messages.
The MS will only accept concatenated text messages with the Protocol Identifier set to the indicated 
value. 
The concatenated text messages function enables the MS to receive text messages longer than 140 
bytes using a special protocol called UDH (User Data Header).
Type the required value in the field.
26.4.14 Support of Concatenated Text Messages
Defines whether there is a support of concatenated messaging (receiving long SDS messages 
greater than 140 bytes). 
A concatenated text message is a chunk of a segmented Long Text Message.
Turn the check box on (Enable) or off (Disable) by clicking in the check box.
26.4.15 Segmented Receiver Timer
At the indicated time, the segmented receiver timer shall expire when not all concatenated text 
messages belonging to the same long text message (same Message Reference Number) have 
been received. 
The operating value depends on the load profile of the customer.
Type the required value in the field.
26.4.16 Long Text Message Length
Defines the maximum length of long text messages in characters.
LTM are short data messages with at least 500 characters 8-bit coded or 250 characters 16-bit 
Unicode coded. This length refers to message text only without Protocol Identifier (PI) information.
Type the required value in the field.