User's Manual

TrimTrac ProE Locator Technical Manual v2.0e 15
If UDP is selected as the transport protocol, then it is strongly recommended that the
GPRS Session Protocol be set “1=TrimTrac Session Protocol”. The TrimTrac Session
Protocol is more fully described in the separate document “TrimTrac Session Protocol
ICD”. The TrimTrac Session Protocol when used over UDP provides the most important
benefits of TCP without the added overhead of TCP. Those applications which are
required to scale to several thousands of users per server would be well advised to
consider using the TrimTrac Session and UDP Transport Protocols together.
Parameter Settings Msg. Header
(See Page)
Commands
( See Page)
GPRS
Transport
Protocol
0=UDP (TrimTrac Session Protocol
mandatory); 1=TCP
GPRS
Session
Protocol
0=None; 1=TrimTrac Session Protocol
(See Separate ICD Document, v1.0)
TrimTrac
Session
Keep-alive
Timeout, T25
In Seconds (0=Never; 1 –43200)
GPRS
Session
Timeout, T26
In Seconds (0=Never; 1–43200)
GPRS
Destination
Address
GPRS destination address in the following
format: 111.222.333.444:12345. This
represents an IP Address and Port Number
pair, maximum number string up to 21
characters
>STKF (155)
>QTKF (161)
>RTKF (176)
AT+CTKF
(119)
GPRS APN Access Point Name (APN) Web address
up to 40 case sensitive alphanumeric
characters as assigned by GPRS network
operator. Example: “apn.trimble.com”.
GPRS
Username
Up to 40 case sensitive alphanumeric
characters
GPRS
Password
Up to 20 case sensitive alphanumeric
characters
>STKJ (156)
>QTKJ (161)
>RTKJ (177)
AT+CTKJ
(121)
Table 6. GPRS Parameters, Settings, Messages and Commands