I just had my electrical appointment on Friday and was given the same price. I was under the impression that the trenching is included in the 'estate covenants' section of my quote. I think maybe because you MUST have the trenching done (at least in my estate) but you don't have to have the smart wiring.
I am still waiting for an email to confirm this though!
Ive got a separate Telstra underground trenching in sales quotation and was advised that this wasn't for smart wiring cabling. Not sure if this is right, my understanding is all underground cabling and piping can go in the same trench provided that there is at least 300mm separation between them.
We have the smart wiring pack for ~$1700, but had to pay an additional $308 for the trench and conduit. We are in a Telstra Velocity smart community, so it's for the fibre from the pit to the side of the house.
What I found odd was that PD / Argus never mentioned the option. It was only post contract when we were reading our documentation (for the gazillionth time) that we wondered if it needing specifying, and lo n behold, it did... as did forking out more money for it...