
SIDACtor
Data Book
Teccor Electronics
(972) 580-7777
4 - 1
R
R
4
Regulatory
Requirements
Due to the enormous cost of interrupted service and failed
network equipment, service providers have adopted
various specifications to help regulate the reliability and
performance of the telecommunications product that they
purchase. In Europe and much of the Far East, the most
common standards are: ITU-T K.20 and K.21; in North
America, most operating companies base their
requirements on GR 1089, FCC Part 68, and UL1459/
UL1950.
GR 1089-Core . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
ITU-T K.20 and K.21 . . . . . . . . . . . . . . . . . . . . 4-11
FCC Part 68 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
UL 1459 2nd Edition. . . . . . . . . . . . . . . . . . . . . 4-21
UL 1950 3rd Edition/CSA C22.2 No.950-95. . . 4-24
UL 497 Series. . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
UL 497A . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
UL 497B . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
Regulatory Compliant Solutions. . . . . . . . . . . . 4-37
Surge Waveforms for Various Standards . . . . . 4-41