I started this thread for two reasons:
first: there are a lot of people who really love mikrotik products and want to use them as 3G Routers (me included) and are unable to find good info regarding supported HW and configuration tips & tricks.
second: maybe mikrotik will realise that this feature (3G Modem support) is requested by many customers / potential customers and will dedicate some time for future development.
Working mini-pcie (USB) cards:
1. Novatel EU870D (also known as Dell 5520 WWAN card)
Tri-band HSDPA/UMTS - 850/1900/2100 MHz
Quad-band EDGE/GPRS - 850/900/1800/1900 MHz
Category 6 (3.6 Mbps); Category 8 (7.2 Mbps)
Supports 7.2 Mbps downlink & 384 Kbps uplink (firmware update is needed for 7.2Mbps)
Modem is recognized by ROS at first start-up after mechanical installation. Default ppp-client interface is created automatically. Tested 2 pieces, both of them unlocked. Firmware version in both cases is: 103.7.00.0 HW Version: 02.
Configuration used by me is basically the default one:
Since Vodafone Romania does not require user&pass i inserted only the APN and enabled the interface. Monitoring was performed over 7 days. Link remained stable. It is true that the speed with this modem is not fantastic but as a backup/failover option will do the job. I'm attaching screens with the HW Details for the two modems taken from the Windows application. To connect the modem to Windows machines you need a simple adapter with either USB port or mini pcie SIM Adapter.
Mini pcie SIM Adapter
I'm using a board from an old external modem which already has SIM support on board. (picture here)
2. Huawey EM820w
Quad-band HSPA+/HSUPA/HSDPA/UMTS/ - 850/900/1900/2100 MHz
Quad-band EDGE/GPRS - 850/900/1900/2100 MHz
Up to 21Mbps - Download and 5.76Mbps - Upload
Modem is recognized by ROS at first start-up after mechanical installation. Default ppp-client interface is created automatically. Tested 2 pieces, both of them unlocked. Firmware version in both cases is: 11.810.10.03.00 Software version: 21.005.18.01.538
Configuration used by me is basically the default one with two minor modifications:
Info channel=2 (first modification)
Second modification consist in running a small script which will keep the Info channel open. Speaking with the company which sold me these two modems, they told me that the Info channel should be kept open if not after 6-7 hours the connection is dropped. So i created a simple script see the screenshot and i used the scheduler to run it starting with system startup. Since i'm running the script and i'm keeping the Info channel open, no more connection drops. (actually almost 48h uptime and counting). The script is not increasing the load on the CPU. I was checking this thing and the load remained the same.
Next on the test table: Sierra Wireless MC8775 (just arrived in the shop)
As a small request from the users, please try to keep this thread as clean as possible without asking questions here. I was looking after such a thread in the past without luck that's why i stated this one. Using the search feature is a good advice but sometimes is more helpful to have all the infos in one place.