Digi's Transport Goes Mainstream With the Transport WR21

When Digi acquired Sarian Systems in 2008, they bought a powerful software package with many robust security features for moving money wirelessly. With the advent of the WR21, we get a glimpse of the future of the Digi product line as they hypridize the features of the legacy ConnectWAN models with the Transport line.

In summary, the Transport WR21 has two flavors. Basically, flavor one is a “WR21 LITE,” with standard software, at a very low price-point, and does not contain all of the sophisticated features as the rest of the Transport line but will fit the bill for many of the same applications as the ConnectWAN. The second flavor, termed ” the enterprise software version” is packing the full feature set of the Transport line including advanced routing, VPN, and statefull firewall. View a specification sheet here.

Since the SKUs of the Transport line can be complex, as a public service we are listing the part numbers and descriptions below.

-WR21-B11B-DB1-SU TransPort WR21 1XRTT Sprint, 1 Ethernet, RS232, Standard Software Package, US Power Supply and Antennas
-WR21-B21B-DB1-SU TransPort WR21 1XRTT Verizon, 1 Ethernet, RS232, Standard Software Package, US Power Supply and Antennas
-WR21-C51B-DB1-SU TransPort WR21 EVDO IUSACELL, 1 Ethernet, RS232, Standard Software Package, US Power Supply and Antennas
-WR21-E11B-DB1-SU TransPort WR21 Edge, 1 Ethernet, RS232, Standard Software Package, US Power Supply and Antennas
-WR21-U61B-DB1-SU TransPort WR21 HSPA+ ATT, 1 Ethernet, RS232, Standard Software Package, US Power Supply and Antennas
-WR21-U71B-DB1-SU TransPort WR21 HSPA+ Worldwide (850/900/1900/2100MHz), 1 Ethernet, RS232, Standard Software Package, US Power Supply and Antennas
-WR21-U81B-DB1-SU TransPort WR21 EVDO/HSPA+ Gobi 3000 (850/900/1900/2100MHz), 1 Ethernet, RS232, Standard Software Package, US Power Supply and Antennas
-WR21-C01B-DB1-SW TransPort WR21 EVDO 450MHz, 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas
WR21-C31B-DB1-SW TransPort WR21 EVDO 450MHz RUIM, 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas
-WR21-C41B-DB1-SW TransPort WR21 EVDO 450MHz Norway, 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas
-WR21-C61B-DB1-SW TransPort WR21 EVDO 450MHz Sweden, 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas
WR21-E11B-DB1-SW TransPort WR21 Edge, 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas
-WR21-U41B-DB1-SW TransPort WR21 HSPA+ EU/APAC (900/2100MHz), 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas
-WR21-U71B-DB1-SW TransPort WR21 HSPA+ Worldwide (850/900/1900/2100MHz), 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas
-WR21-U81B-DB1-SW TransPort WR21 EVDO/HSPA+ Gobi 3000 (850/900/1900/2100MHz), 1 Ethernet, RS232, Standard Software Package, International Power Supply and Antennas

A recent Digi newsletter contained an excellent article about utilizing the Digi Transport line’s Digi Surelink feature.
Digi SureLink has several mechanisms to help maintain a persistent wireless connection and take action if the connection is lost.
First, there are mechanisms to test that traffic is actually passing. On the Digi TransPort® this can be done actively by generating traffic from the device or passively by testing outbound TCP traffic and checking that responses (ACKs) are received.
If the test fails, then corrective action is taken. These configurable items are:
1. Drop the current PPP session and attempt to re-establish it. (If the Digi TransPort senses the PPP session is gone, it will automatically attempt to re-establish it even without Digi SureLink.)
2. If the PPP session does not re-establish, then reset the embedded module and try again.
3. If that still fails, then reboot the Digi Transport device itself.
Since several different functions come into play, the Digi TransPort engineers came up with an easy-to-follow SureLink Wizard in the built-in WebUI. The user selects the wizard, reads the on-screen info and prompts, and builds the SureLink setup without even needing to crack the User Manual.