Ok, bit of news, the amphenol connector on the back of the SX200 ICP MX actually contains:
Table 69: SX-200 ICP, Onboard Analog/DNIC
Tip & Ring Assignments (Back Panel Amphenol Connector)
Pins Pairs Circuit type Bay/Slot/
Circuit Comments
1/26 W-BL / BL-W ONS/CLASS 1/13/3 Default Extension #: 200
2/27 W-O / O-W ONS/CLASS 1/13/4 Default Extension #: 201
3/28 W-G / G-W ONS/CLASS 1/13/5 Available as upgrade option
4/29 W-BR / BR-W ONS/CLASS 1/13/6 Available as upgrade option
5/30 NOT USED
6/31 R-BL / BL-R DNIC 1/13/1 Subattendant Default Extension #: 199
7/32 R-O / O-R DNIC 1/13/2 SUPERCONSOLE 1000 Default Extension #: 198
8/33 - 10/35 NOT USED
11/36 - 16/41 BK-BL / BL-BK LS/CLASS 1/13/7 - 1/13/12
Trunks circuits 1/13/7 and 1/13/8 are System Fail Transfer trunks. They connect to ONS circuits 1/13/3 and 4 respectively.
17/42 - 22/47 Y-O / O-Y LS/CLASS 1/13/13 - 1/13/18
Available as upgrade option
48/23 - 50/25 NOT USED
So it looks like I need no external hardware at all. Of course that go with Murphy's Law, as i just bought a bay and 2 LS/GS cards
But just to be sure the LS/CLASS circuit will let me attack a POTS to it?
Thanks!
Jim