Regulatory Compliant Solutions
TIA-968 (formerly known as FCC Part 68) and UL 60950
Because equipment that is tested to TIA-968 (formerly known as FCC Part 68)
specifications is also generally tested to UL 60950 specifications, it is easiest to look at a
solution that meets both FCC and UL requirements simultaneously.
TIA-968 Operational Solution and UL 60950
Figure 4.16 and Figure 4.17 show line interface protection circuits that meet UL 60950
power cross requirements and pass TIA-968 Type A and Type B lightning immunity tests
operationally.
F1250T
Tip
To
Protected
Equipment
Ring
F1250T
Figure 4.16 Balanced Line Protection using Teccor’s “AC” Series
F1250T
Tip
To
Protected
Equipment
Ring
Figure 4.17 Metallic-only Solution using Teccor’s “SB” or “EB” Series
TIA-968 Non-Operational Solution and UL 60950
Although the circuits shown in Figure 4.16 and Figure 4.17 provide an operational solution
for TIA-968, TIA-968 allows telecommunications equipment to pass Type A surges non-
operationally as well. For non-operational TIA-968 solutions, coordinate the IPP rating of the
SIDACtor device and the I2t rating of the fuse so that both will withstand the TIA-968 Type B
surge, but that during the Type A surge the fuse will open.
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SIDACtor Data Book and Design Guide
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