Additional Information.
Let me say I'm a End User who is trying to understand enough to be able to ask a intelligent questins.

Equiptment currently in place:
SX-200 6x20x8 system ( MX ?).
SX-200 IP Stratum 3 Clock module.
SX-200 NSU
Module FIM 820 NM multimode
Dual FIM 820 NM multimode
Analogue Option Card (6LS/2ONS).
I think I understand the LS above means: Loop Start Trunk. What does "ONS" Mean?
5448PKM Kit (48 Key.
ONS / CLASS card.
Also Mitel Station Set Admin Option, Level 5.
Software Option VoiceMail Softkeys, Sofware option Max1 Digital Trunk Link, S/W SS4000 Sets??
TDM User Devices.
Plus Licenses, Phones, and Power Packs.

To vad60:
By Redundent I mean if the North East location burned to the ground, customers would still be able to phone in via a "Back Up System" in the Mid West.

To Dane:
Currently in location #1 25 Desk sets 5207, w/ 10 Teleworker sets 5215s.
Location # 2 will be 8 to 10 Desk sets w/ 2 to 3 Teleworkers.

To fifty5footer:
I don't know EL's ? We do have the Sx-200 ICP ( intergrated Communication Platform).I think we have that capablity.

Can it run as one big system ?? And then if location # 1 goes down, we could "Flip The Switch " at location # 2 power it up, it would reflect the Identical Configuration as Location? And I guess we would need to "Adjust MAC & IP Adresses" with Mitel.??

Am I think correctly???