Bilateral. Hubbing. Or the exchange.
There are three ways to trade wholesale voice. Two of them were designed decades ago around constraints that no longer need to exist. Here is the honest comparison, dimension by dimension.
Dimension by dimension.
Where the old models still make sense.
A true bilateral with your largest reciprocal partner — balanced traffic, decades of trust, dedicated capacity — can still earn its overhead. That's why private rooms exist: keep the negotiated relationship, hand the financial layer to the exchange. And classic hubbing is simpler than an exchange when you genuinely don't want supplier choice — you trade transparency for someone else's blend. The exchange's bet is that most of your book deserves better than either.
Hubbing's convenience. Bilateral's control. Neither's risk.
One trunk like a hub — but you see every seller's price and quality and choose, like a bilateral book. And unlike both, the credit risk is engineered out: underwritten, insured, and cleared by the exchange.