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Q&A

Won questions PSAC redundancy and backup system topology

New York City Council · Sep 9, 2026 · starts 1:34:04 · 1 min 56 sec

Won questions why there isn't a backup PSAC 2 system that can be switched on when the primary fails, and whether rerouting all traffic to PSAC 1 would overload it. Gelobter explains each PSAC can independently handle the full city load. Won argues for a disaster recovery backup with original configurations ready to switch on.

Phil Wong

Okay, but I want to go to your statement.

Phil Wong

It says here, Motorola began remediating the issue by directing all core traffic to PSAC 1 for routing.

Lisa Gelobter

Yes.

Phil Wong

It says right here.

Phil Wong

So now PSAC 2, the reason PSAC 2 exists is to relieve the capacity of PSAC 1.

Phil Wong

Is that right?

Lisa Gelobter

Traffic goes.

Lisa Gelobter

To both PSACs.

Phil Wong

Okay, yeah, there's just too much traffic and we need another network, PSAC 2.

Lisa Gelobter

It's not too much traffic, but...

Phil Wong

Yeah, what I'm saying is that if PSAC 2 is down for whatever reasons, there should be like a backup machine somewhere that you can switch on.

Phil Wong

Okay, this is down.

Phil Wong

Okay, let's switch this one on, and we have two working networks again.

Phil Wong

What I don't understand is, explain to me, you're referring the traffic of two systems, PSAC 2 and PSAC 1, and expect them to work.

Phil Wong

Wouldn't that overload PSAC 1?

Phil Wong

I mean, isn't that common sense?

Lisa Gelobter

Thank you for the question.

Lisa Gelobter

I do think that understanding the technical implementations and how all the PSACs are related, I think is really critical.

Lisa Gelobter

Each PSAC was built to be able to handle independently the full city load.

Phil Wong

Okay, what I'm trying to say is that if PSAC 2 is down for whatever reason, there should be a backup PSAC 2 where you can switch on any time while you get the one that's down, you get that to work.

Phil Wong

That's what I'm trying to say.

Phil Wong

This is like a network redundancy issue, a topology issue that you may want to look at.

Lisa Gelobter

Understood.

Lisa Gelobter

The challenge with diagnosing the source of the problem is that