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CHAPTER 6
Cabling E-Series Routers
6-6
• European – Two 75-ohm E1 2.048-Mbps inputs with BNC connectors
• North American – Two 100-ohm T1 inputs with three pin wire-wrap
connectors. Pins are labeled T (tip), G (ground), and R (ring). We
recommend using 26-AWG wire minimum.
Note: Use shielded cables to connect the external clock sources to the clock
source input ports.
Figure 6-2 ERX-14xx model SRP I/O module
A
T
G
R
T1 100 OHM
CLOCK IN
B
T
G
R
E1 75 OHM
CLOCK IN
+
-
+
-
+
-
ALARMSEXTERNAL TIMING
CONSOLE
MINOR
MAJOR
CRITICAL
10/100
BASE T
RS-232
BNC (Europe)
DB-9
RJ-45
26-AWG wire
Wire-wrap connectors
(North America, Japan)
g013750