NSU Redundant connection

[MITELMX]

Hi to all,
I have a fail over system with 2 LX Controller, one MX, 1 R2 NSU and one ASU, my problem here or doubt is because i have two connection with my phone supplier, i mean, the conncetion is coming to me in a fiber optic ring, in this moment i have one connection to the R2 NSU, and i need to connect the other part of the ring.
What i need to configure and where?
The first pair of cables is going to the L0 port and give me the servicem and i have the other port L1 with a loop.(All these in the 3300 R2 NSU Device)
What device i have to change or reconfigure to support this scenario, if is possible...

Thanks in adavance.

 

[MitelInMyBlood]

At minimum you'll need another R2 NSU and another PRI span from the local exchange carrier. You cannot double terminate or bridge a single PRI onto 2 different NSUs, nor can you bridge the fiber or CIM connection from 2 controllers onto 1 single NSU.

Of course therein lies the weak point in resiliency. Your external TDM trunks are not resilient and are going to go down whenever the controller their NSU is connected to goes down.

I don't know any way to split or "fractionalize" a PRI because you have only one D channel for signalling.