Watching SG1 s10e7, and a jaffa uses one of the team's radios to talk with Daniel Jackson and then to deliver orders to his subordinate, and it made me wonder why the goa'uld never gave the jaffa handheld communicators. It seems like all messages are delivered by word of mouth except for ship to ship communication, and the communication balls which are apparently only used by the goa'uld themselves. Given how useful it would be for coordinating troops I'm surprised they don't have them. I wonder why the showrunners never thought to give them something like a goa'uld radio.
My assumption is the society doesn't encourage down to up communication. The leader says take that point from the east, so they take it from the east. Saying the south us a better option might be seen as defying the gods.
I also recall in s7e01 the Jaffa did have a way of receiving ordered, but no way to talk back which is where my head canon comes from.
The teleballs , as I call them, seem like a 1:1 system not a one to many like you would need for large group tactics.