Re: Internet, Telephone and TV!!!
The MiFi and EVDO are both great services to provide Internet while you're out on the road. I live in an area that did not have DSL or Cable available for a number of years and was an early adopter of EVDO, even before Rev A came out. I also am waiting for the transition of many wireless networks to 4G over the next year or so that will deliver even better throughput on both the upstream and downstream side of the network - nearing DSL speeds.
There are a couple of important limitations to be aware of when using EVDO. All of the major US based wireless carriers (VZ, T, S) have "unlimited" data plans that limit you to 5 GB of data throughput per month. For most people who are checking e-mail, uploading a few photos, or doing some light duty surfing on the web, you'll be fine with that 5 GB of data each month. If, however, you're a power user you could go over your data usage and get a really big bill for the overage. For example, if you're downloading video podcasts on iTunes you can expect to use 500 MB of your data downloading just 1 show. Download a couple of podcasts along with your regular data usage and you could find yourself over your limit in a hurry. Streaming video using Hulu, Boxee, or your SlingBox? Another way to really eat into your data usage. Uploading a lot of photos, or working from your RV on a regular basis? That might take you past your 5 GB limit.
Another limitation of EVDO is latency. While my home DSL connection "pings" a remote server in just 16ms, over EVDO that hang time jumps up to 143ms. Why is this important? Some connections are particularly sensitive to latency. VPN connections, for example, might not hold up over EVDO. VOIP is another application that often does not do well on EVDO due to latency issues. I was successful using a soft client VOIP application over EVDO several times, but connecting a hard wire phone like a Cisco VOIP phone or a VOIP ATA adapter is something I was never able to do because of the latency. Voice quality using VoIP over EVDO can be poor with lots of jitter, picket fencing, and dropped packets. To make VoIP work over EVDO you really need to know your soft client software, the codecs you are using and how to adjust them. With satellite based Internet services, latency is even worse, running upwards of 250ms. Running VoIP or VPN services is nearly impossible using satellite based Internet. One other note, it's likely a violation of the terms of service to use VoIP over EVDO, since the mobile data companies would also like you to purchase mobile phone service as well. With all of the attention on net neutrality with the recent FCC NPRM on the subject, I doubt any of the carriers are blocking UDP packets on specific ports related to VoIP but it would not surprise me if that changed after attention shifted away from the net neutrality debate.
Unfortunately, I do not believe there is a perfect solution for mobile Internet on the road. We use two different EVDO cards from two different carriers, a Cradlepoint EVDO router with load balancing, dueling iPhones, and we still seek out Wireless Internet on the road in order to use bandwidth intense applications or stream video content. I have also used satellite Internet extensively, and while it will work some places EVDO will not, I do not recommend it unless you have a specific application you're planning for like disaster response or a long term stay in a very remote area.
Robert
camping blog