User's Manual
Table Of Contents
- Preface
- Contents
- 1 Introduction
- 2 Safety requirements
- 3 Physical description
- 4 Installation prerequisites
- 6 Installing the iRM4451
- 6.1 Assembling cables
- 6.2 Routing pre-assembled power/GigE optical fronthaul/grounding cables
- 6.3 Installing the iRM4451 mounting bracket
- 6.4 Hoisting the iRM4451 on elevated structures
- 6.5 Installing the iRM4451 on the mounting bracket
- 6.6 Connecting the grounding cable
- 6.1 Connecting the RET cables
- 6.1 Connecting the GigE optical fronthaul cables
- 6.1 Connecting the –48 V dc power cable
- 6.2 Checking power
- 6.3 Installing the solar shield
- 7 Terms, Acronyms and Abbreviations
- 5 iRM4451 installation overview
Physical description
iRM4451 RRH Product Description and Installation Guide 3-7
The RET cable can be daisy-chained to each of the PCS/AWS antenna inputs/
outputs served by the iRM4451. Antenna remote electrical tilt control is facilitated
within the EMS user interface.
Figure 3-8 RET 8-pin DIN connector
3.2.5 Fronthaul connectors
Two Gigabit Ethernet (GigE) optical SFP ports provide connection for up to two
duplex multi-/single-mode optical GigE cables. The GigE entry ports, labeled FH1
and FH2, are located on the bottom of the iRM4451 (see
Figure 3-5). The Q-XCO
quick-lock SFP connectors are RoHs compliant and meet the IEC 61753-1 Cat. E
standard for performance. Connector FH1 is intended for fronthaul support. FH2
is used to daisy-chain sidehaul support to up to one other iRM4451.
The iRM4451 is shipped with captive dust covers over both of the fronthaul entry
ports. The dust covers should remain in place until the GigE optical Ethernet
cables are connected. The dust covers are keyed and have red alignment arrows
to ensure proper installation. To remove the dust cover, twist 120° and pull. The
dust covers are re-installed in the opposite manner.
The GigE 2× LC Huber + Suhner Q-XCO fiber optic cable is a specialty cable with a
bulkhead cable gland integrated into the cable (see
Figure 3-9). The cable gland
has a ruggedized quick-lock SFP mating connector and is connected the same way
as the dust cap.
NOTE
Remove the dust cap only when ready to connect the cable to the iRM4451.
1 NC
2 NC
3 RS-485 B
4 NC
5 RS-485 A
6 +24 V dc
7 Dc return
8 NC