Found the announcement: Draft Mexican Official Standard PROY-NOM-151-SCT1-1999 Public Network Interfaces for Terminal Equipment.
This standard is applicable to any device connected or interconnected to a network terminal conection point, known as terminal equipment. Covers: Prevention of damage to or deteriation of public telecom netowrks Prevention of Electromagnetic interference Electromagnetic compatibility with other users Safety of Operators and the general public (inasmuch as not covered by SECOFI requirements NOM 019) Interoperability with public telecom networks Efficient use of radio spectrum Billing protection Draft Mexican Official Standard PROY-NOM-152-SCT1-1999 Digital Public Network Interfaces (Digital Interfaces at 2,048 kbit/s) Covers: minimum technical characteristics for digital interfaces at 2,048 kbit/s. Ciao, Vic
