Building a Self-Contained Phone Network with Asterisk and Grandstream ATAs
Eighteen Lines, One PBX, and a Very Long Day Photo 1. Grandstream HT818 & HT802 for VoIP I already had a 2-port ATA in place, and for a while, that was enough. But as more phones started coming in—especially additional rotary phones, a pair of teletype machines, and a pair of crank phones being brought to life—it quickly became clear that two lines wasn’t going to cut it. I had been using a…











