Item
|
DTU IP Modem
|
Normal Modem
|
Dial up
|
Support automatically dialup;
Online always; trigger to dialup, schedule to dialup
|
Need machine/pc back platform to dialup
|
TCP/IP, PPP
|
Yes
|
Yes
|
Interface
|
RS232/RS485
|
RS232/RS485
|
Bandwidth for GPRS/CDMA
|
20~60Kbit/s
|
20~60Kbit/s
|
Coverage
|
Same as GSM network
|
Same as GSM network
|
Transparent Data transmission
|
Yes
|
No
|
VDPN
|
Yes
|
Yes
|
Point to Point
|
Yes
|
Depends on network
|
Point to Multipoint
|
Yes
|
No
|
Center to Multipoint
|
Yes
|
No
|
Dynamite IP Address Mapping
|
Yes
|
No
|
Multi-protocol
|
Yes
|
No
|
Applications
|
Utilities, traffic control, finance and industry supervision, for device not support dialup
|
Mobile Internet access for PC, for device support dialup
|