Mexico’s telecommunications regulator has alleged that it is proposing sanctions against the country’s biggest mobile phone operator and a major cable TV provider over recent failures in their service.

According to the Federal Telecommunications Commission, or Cofetel, America Movil unit Telcel, the country’s biggest wireless provider with 62.4 million subscribers, had a network failure in November that affected customers and didn’t notify authorities until after the 24-hour deadline. An inspection visit showed that 52% of calls had failed during the outage, the company could be fined up to 20,000 times the daily minimum wage — about US$89,000 for the first violation and up to twice that amount for the second.

Cofetel stated that the proposal was sent to the Communications and Transport Ministry, which will make the final decision and would apply the sanctions. Its board is also proposing sanctions against Empresas Cablevision, a unit of media conglomerate Grupo Televisa for service interruptions to clients in the Mexico City area during work being carried out in October and November on the company’s network. The regulator said Empresas Cablevision didn’t have prior government authorization for the work. The company also provides Internet and phone service.

According to Empresas Cablevision, the service interruptions were “isolated and temporary events” as the company upgrades its network to offer such services as high-speed Internet, and interactive and high-definition TV. It had advised its customers and authorities about the upgrades being made to its network.