I have an old 1114 (you can usually find them on eBay), which is a 4-port, line-capturing model (if someone is using the phone line, it kills the connection and then dials). As nobody is usually here when I'm not, I would not have paid extra for it - I thought I was getting an 1104.
It has built-in power-outage and noise sensors (worked great when we were out-of-town and my son had a big party) that don't occupy the connectors.
I don't bother with humidity, but have a
Thermalarm in the GH, which is connected to an
X10 Powerflash unit plugged into an enclosed power receptacle. When the upper- or lower temp limit is reached, the X10 module sends a signal over my buried power lines to an
X10 universal module that is plugged into the wall and connected to the Sensaphone in my home office.
I have three numbers programmed into the unit - home (to wake me up in the middle of the night), office, and cell phone. There is a 4th slot, and if I know a number where I'll be, I'll sometimes enter it. (I forgot to remove my mother-in-law's number once, and she got calls for several weeks whenever we vacuumed the room!)
In an alarm situation, it first "speaks" "alarm condition 1 exists" from the unit, and will try 10 times for an acknowledgment (entering a PIN in the keypad). If that doesn't happen, it calls the first number 10 times (awaiting telephone keypad entry), then the second, and so-on.
Setting up the unit itself is no issue whatsoever, and it has helped me in two crucial situations - once when the propane folks skipped a week one winter, and once when a squirrel decided to short the overhead lines on a 100°F day, killing all power and shutting down my fogger, fans, and ventilation shutters.