The Commerce Commission says it has requested further information from a complainant who is claiming anti-competitive treatment by Telecom.
The commission won't name the complainant but Hamilton company Lloyd Group says it is the company concerned.
Lloyd Group, which is an ISP, is attempting to provide DSL access to the Internet for commercial customers using analogue A1 Telecom phone lines.
However, Telecom maintains such circuits are not appropriate for high-speed data applications, and such use is precluded by the standard contract for A1 lines.
To prevent their use for that purpose, it is applying filtering to A1 circuits ordered by Lloyd Group.
A Commerce Commission spokesman, Vincent Cholewa, says more details are needed from Lloyd Group before the commission can decide whether the complaint warrants investigation. However, Lloyd Group co-founder Daniel Lee says he hasn't had a request for further details.
Lee says the company is attempting to enlist support from the Auckland Chamber of Commerce in its argument with Telecom.
The chamber is a Lloyd Group Internet access customer and Lee says he and co-founder Lloyd Gallagher plan to put together a bundled offering of high-speed Net and phone services for chamber members.
They hope once the chamber can see how beneficial the offering would be for its members, it will lobby Telecom on Lloyd Group's behalf. Lee says without access to unfiltered A1 circuits, which are standard phone lines, Lloyd Group is unable to offer its DSL service.