Here is my long awaited photos of my 501 KSU setup.
The way I have my 1A2 501 KSU system setup is behind a Merlin Magix PBX, any time you select lines 1, 2 and 3 you will get a outside line.
Lines 1 and 2 are the two lines from my VOIP adapter and line 3 is connected to my cell phone via blue tooth gateway adapter.
Line 4 is the intercom line on the Merlin Magix PBX, so you can dial any ext on the Merlin Magix system.
Line 5 on the 1A2 key system is the internal intercom.
I have a device that taps into the 1A2 key systemâ€™s intercom line from line 4 on the Merlin Magix PBX. You can transfer lines 1 to 2 from the 1A2 key system to any ext on the Merlin Magix PBX by flash hook and then dial the ext.
1a2 key system lines.
Line 1 - ext 31 accesses outside line 1
Line 2 - ext 32 accesses outside line 2
Line 3 - ext 33 accesses outside line 3
Line 4 - ext 34 accesses Merlin Magixâ€™s intercom line
Line 5 is the intercom line for the 1a2 key system.
Teltone C-19 Intercom
TAP in device