The Tracker 2720 & 2730 are modems that feature a secure encrypted challenge/response mechanism. The Tracker 2740 series can be used as an intelligent application platform but has fixed levels of connectivity. The Tracker 2750 is for those customers that need the ability to swap and change the configuration of the Tracker in the field. We are also able to develop additional modules for the Tracker 2750 if you have more specialised requirements. 

Feature	Tracker 2720/30	Tracker 2740	Tracker 2741	Tracker 2745	Tracker 2746	Tracker 2750
Operating Environment
Secure Linux Based OS	N/A
Programmable Software Platform	N/A
Software Development Kit	N/A
Data Storage
200MB+ Non Volatile Flash Std (Options to 2 GB)	N/A
Ports
Serial Ports RS232 with RJ45 Interface	1 9-way 'D' Connector	1	1	2	2	0 - 16
Console Port RS232 With RJ-45 Interface	N/A	1	1	1	1	1
v.92 56K Modems	1	1	1	1	1	0 - 16
10/100 Ethernet	N/A	1	2	1	2	0 - 16
Contact Closures	N/A	No	No	4	4	0 - 64
Access Methods
v.92 Modem
PPP	N/A
VPN Tunnel	N/A
Telnet, FTP	N/A
Security
Two-factor Authentication
Firewall	N/A
Restricted Answering	N/A
Audit Trail	N/A
Network Management
Alerting Service	N/A
Logging Service	N/A
Monitoring Service	N/A
Comfort Alarm	N/A
SNMP Capture/Redirect	N/A
SNMP Agent	N/A
Other
Free Lifetime Technical Support
12 Month Warranty
UL & CE Compliance
Secure Menu Interface	N/A
Remote Configuration
Remote Software Upgrade
1U 19" Rack Option	N/A
1 Hour UPS	N/A
4 Hour UPS	N/A	No	No	No	No
Power Via External Adapter (Supplied)	+5v DC	+5v DC	+5v DC	+5v DC	+5v DC	+9v DC
200,000 Hours MTBF (Exc. Batteries)	N/A