Installation guide

Installing the E4G-400 Cell Site Aggregation Router
E4G Series Routers Hardware Installation Guide
69
NOTE
Save the cover for later re-use in case you must remove the port option card and do not have a
replacement card. An option slot must be covered to ensure satisfactory EMI levels and to maintain adequate
airflow through the router.
Connecting Timing Cables to the E4G-400 Router
The front panel of the E4G-400 router 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 OUT
- 1 PPS or 8 KHz frame output
- 10 MHz or 2.048 MHz or 4.544 MHz output
● Two mini-BNC connectors labeled IN
-1 PPS input
- 10 MHz input
● One RJ-45 connector for time-of-day (ToD) input/output or for RS-422 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.
Connecting Cables to the E4G-B16T1E1 Module
The ports on the E4G-B16T1E1 module are implemented as MRJ21 connectors. Each connector
represents eight ports. Two cable types are available for these ports:
● MRJ21-to-RJ-45 fan-out cable (Extreme Networks part number 16220; see Figure 46)
● MRJ21-to-MRJ21 cable
CAUTION
When you handle the RJ21 cable for the E4G-B16T1E1 module, be careful not to bend the cable too
sharply, especially at the connector. Make sure the cable extends at least 3 inches from the back panel of the
module before it starts to bend.