Analog signaling in a digital interface
Since I'm used to work in the "data world", until now it was usual to configure E1s (cause I'm in Europe) with "channel-group" or "pri-group" on controllers. There was no secret, just framing, lincode, clocking and timeslots to use. After that, only L2 protocol needed to be specified on serial interface and all was ready to go.
Now, getting inside the voice world, the "pri-group" doesn't change, as CCS is still there, but here comes the "ds0-group", with analog (Analog!!??) signaling types associated. I really don't get how analog signaling is mixed with digital interfaces. Is somebody used to use this kind of configs?