High Speed Transmission Equipment
CPE Interface
Remote Terminal Interface
F1250T
Tip
U-Interface
P3100SC MC
Ring
CPE
F1250T
P3100SC MC
Power
Sink
Line 1
Ring Detect
Ring Trip
Ring Forward
Off-Hook
F1250T
P3100SC MC
Line 2
Detection
Figure 3.15 Pair Gain RT Protection
Component Selection
The “SC MC” SIDACtor device and F1250T TeleLink fuse were chosen because both
components meet GR 1089 surge immunity requirements without the use of additional
series resistance. An MC is chosen to reduce degradation of data rates. The voltage rating
of the P1800SC MC was selected to ensure coordination with loop powering up to 150 V.
The voltage rating of the P3100SC MC was selected to ensure coordination with POTS
ringing and battery voltages.
© 2002 Teccor Electronics
3 - 13
http://www.teccor.com
+1 972-580-7777
®
SIDACtor Data Book and Design Guide
TECCOR [ TECCOR ELECTRONICS ]
