Obi110 as FXO Gateway not functioning

I have an OBi110 I want to use as a bridge between my FreePBX Server and our current (old) Samsung Prostar DCS PBX system. If someone were to call an office extension, I want them to get to a destination on the FreePBX server.

I plugged the phone line with the extension 213 into the LINE port on the OBi110.

I followed the guide on the FreePBX wiki: http://wiki.freepbx.org/pages/viewpage.action?pageId=4161594

Anywhere where a phone number was supposed to go, I used 213 i.e. Physical Interfaces > LINE Port > LINE PORT > InboundCallRoute=SP2(213)

The guide indicated that when you dial 81 you should hear a dial tone. All I hear is some static and clicks, and a faint echo of myself. When an office phone on the old PBX dials that extension, their phones display "PLUG OUT" and play an error sound. When I dial the external number of the company, as soon as I hear the IVR Selection Menu, I can dial an extension. When I dial 213 I hear "Invalid Number." During both of these events, the light on OBi110 for the LINE port stays a solid green. (Also, I have not done anything with the Phone Line, but that light is solid green too.)

While looking at the PHONE & LINE Status page on the OBi110 when no activity:

Parameter Name Line Port Status
State On Hook
Loop Current 0 mA
VBAT
TipRingVoltage 46 V
LastCallerInfo "

When I dial 81 from an IP Phone connected to FreePBX I get:

Parameter Name Line Port Status
State Off Hook
Loop Current 102 mA
VBAT
TipRingVoltage 40 V
LastCallerInfo "

Does anyone know any step I may have missed? Anything to try? Is this impossible?

Let me know if anyone needs additional information.

Thanks for any feedback.