You don’t. SuretyCAM has to do it via alarm.com back end. And unless its changed, my understanding is you cannot get firmware v1.10, or version1.10.1 or any newer firmware via OTA (cellular over the air update) for TS1 touchpads.
What this means is if you have or get any touch keypads for your panel, you won’t be able to update the firmware without the cable, and if the firmware for ts1 and panel do not match, touch keypads will not work.
You may be stuck with firmware v1.9.6
My suggestion is if you are going to DIY your own system, that you go get a win7 netbook (runs less than $200) and the 2GIG update cable with ts1 4 pin adapter.
2GIG releases new firmware on the average twice a year, and a new firmware update release is imminent.