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Australian telecommunications companies have co-located equipment only on a few of the NBN Co's fixed wireless towers so far, the company says.
While 71 sites are in the process of having equipment installed, Telstra is already using seven sites and Optus two.
There are a total of 1600 fixed-wireless towers which belong to the NBN Co.
There have been complaints from users that the fixed wireless speeds are worse than ADSL.
{loadposition sam08}NBN Co wants retail service providers to use its fixed-wireless towers so they can resell the company's fixed-wireless plans, rather than their own plans.
The company told the Senate's Joint Standing Committee on the National Broadband Network that of the 71 sites, nine fixed-wireless base stations had active access seeker equipment co-located.
These comprised seven sites being utilised by Telstra and two by Optus.
It added: "A further 62 NBN fixed-wireless facilities are in the process of having co-located access seeker equipment installed (installation can take up to three months to complete).
"The relevant carriers are Telstra (21), Optus (25), and Vodafone (16)."
