EM12-G AT Command for Carrier Aggregation question

Misc Mini PCI-E and M.2 Modem Card and USB Dongle Topics
Forum rules
Use the SEARCH function for related topics PRIOR to posting a new topic on the same subject.
Post Reply
timc4444
Posts: 12
Joined: Wed Jun 10, 2020 8:30 pm
Has thanked: 0
Been thanked: 2 times

EM12-G AT Command for Carrier Aggregation question

Post by timc4444 »

B2+B14+B66 is a valid combination (3 x CA)for my modem and the tower nearest me. Using the calculated AT string from the tutorial, do I have to remove any auto scan default command first ? Save the default setup first ?
timc4444
Posts: 12
Joined: Wed Jun 10, 2020 8:30 pm
Has thanked: 0
Been thanked: 2 times

Re: EM12-G AT Command for Carrier Aggregation question

Post by timc4444 »

Well here goes nothing. I'll try it. I just wanted to save myself a headache
User avatar
Didneywhorl
Posts: 3635
Joined: Fri Mar 23, 2018 5:37 pm
Location: USA
Has thanked: 1369 times
Been thanked: 761 times
Contact:

Re: EM12-G AT Command for Carrier Aggregation question

Post by Didneywhorl »

The CA is not, and can not be, controlled by the modem at all; it merely has capability.

If you lock to those specific bands, then you have a good chance of getting it to do so. They kicker is that the modem HAS TO use the first band in your CA combo as the anchor band, aka the primary serving cell. If it connects to B66 as the primary, then it may not work, unless B66 + B2 + B14 (or B66 + B14 + B2) is listed as a combo for the EM12. The order of the combo is very important, it is not random.
timc4444
Posts: 12
Joined: Wed Jun 10, 2020 8:30 pm
Has thanked: 0
Been thanked: 2 times

Re: EM12-G AT Command for Carrier Aggregation question

Post by timc4444 »

Whoa that's good to know about the combination order. I don't think I've ever seen that. I tried to spell everything out to help folks who logically search using whole terms. Seems to be the kicker with everyone abbreviating.
timc4444
Posts: 12
Joined: Wed Jun 10, 2020 8:30 pm
Has thanked: 0
Been thanked: 2 times

Re: EM12-G AT Command for Carrier Aggregation question

Post by timc4444 »

So far, so good with an occasional outage that unplugging and re-plugging seems to fix
Post Reply

Return to “Misc Modem Cards and Dongles”