(Telecompaper) Telefonica has reiterated its threat to halt the accelerated rollout of its Spanish fibre optic operations after communications regulator CNMC finally proposed that the company provide wholesale access to its network in many parts of Spain. The CNMC's long-delayed review of the fixed broadband market, initially proposed at the end of last year, requires Telefonica to share access to its network in all of Spain apart from 34 towns and cities and removes the 30 Mbps limit for indirect access. The initial proposal would have required the former incumbent to open up its network in all of Spain apart from 9 cities with a view to ensuring competition and promoting investment in next generation access (NGA) networks. However, the regulator ended up identifying a total of 34 localities in which three or more companies were already offering superfast internet via fibre or cable connections. Immediately following the publication of the CNMC's draft review, Telefonica told business daily Expansion that it was "deeply concerned" about the new regulation, which may result in the end of a fibre-optic rollout "that has placed Spain at the top of the European tables in terms of number of homes passed". The company added that its deployment plans would be placed under review until it had studied the regulator's proposal in depth.