Installation guide

Chapter 3: Installing an E4G Series Router
E4G Series Routers Hardware Installation Guide
54
Connecting Timing Cables to the E4G-200 Series Router
The clock module provides the types of cable connections listed below for connecting a Building
Integrated Timing Supply (BITS) or GPS timing source.
● Two mini-BNC connectors labeled IN
-1 PPS input
- 10 MHz input
● Two mini-BNC connectors labeled OUT
- 1 PPS or 8 KHz frame output
- 10 MHz or 2.048 MHz or 1.544 MHz output
● One RJ-45 connector for time-of-day (ToD) input/output or for RJ422 BITS input
To connect to the mini-BNC connectors, use a 50-ohm coaxial cable with a mini-BNC connector at one
end and a standard BNC connector at the other.
To connect to the RJ-45 connector, use a twisted-pair cable with the pinouts listed in Table 19 on
page 127.
Installing a T1/E1 Module
You can install or remove a T1/E1 module in the E4G-200 series router without powering down the
router; however, you must reboot the router to initialize a newly installed T1/E1 module.
To install a T1/E1 module:
1 Attach an ESD-preventive wrist strap to your bare wrist and connect the metal end to an appropriate
ground point on the rack.
2 On the front panel of the E4G-200 series router, remove the cover from the T1/E1 module slot
(Figure 25).
Figure 25: T1/E1 Module Slot Cover
3 Carefully slide the T1/E1 module all the way into the slot (Figure 26).
4 Align and securely tighten the captive retaining screws.
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