BS 7940:1999

This standard applies to apparatus having an interface for the connection of Terminal Equipment (T.E.) intended for a Direct Exchange Line (D.E.L.) and specifies the performance requirements of the interface which make it appear to the attached T.E. that is interworking with a single 2-wire analogue PSTN D.E.L.

Cross References:
BS 6312-2-1:1994
Telecommunications Act 1984
BT SIN 249
ETS 300659
BT SIN 227
BT SIN 242
BS 6312-1:1994
BS 6305:1992
ITU-T Recommendation P.53