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DBS3900 LampSite
Installation Guide
Installation Guide
7 Installing a pRRU3901
Issue 08 (2016-05-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
102
Prerequisites
The Ethernet cable must be of Category 5e (enhanced) or higher. In addition, its
cross-sectional area must be 24 AWG or larger and frame spread rating must be CM or
higher.
cross-sectional area must be 24 AWG or larger and frame spread rating must be CM or
higher.
The Ethernet cables can be straight-through cables or crossover cables.
With the internal PoE module providing power, the maximum length of an Ethernet
cable is 100 m. With the Extender, the distance of the pRRU3901 and RHUB can be
extended by the Extender up to a total distance of 200 m.
cable is 100 m. With the Extender, the distance of the pRRU3901 and RHUB can be
extended by the Extender up to a total distance of 200 m.
Ethernet cables are not delivered, and they must be prepared onsite. You need to use a
network cable tester to test the Ethernet cable connection.
network cable tester to test the Ethernet cable connection.
Context
The Ethernet cable has the following functions:
Provides power supply for the pRRU3901 when the cable connects the CPRI_E0 port on
the pRRU3901 to the RHUB.
the pRRU3901 to the RHUB.
Transmits CPRI signals between an RHUB and a pRRU3901.
Provides Wi-Fi services for the pRRU3901 when the cable connects the GE port on the
pRRU3901 with three transmission ports to the AC.
pRRU3901 with three transmission ports to the AC.
Using the CPRI_E1 port on the pRRU3901 has the same Ethernet cable connection to the
RHUB as using the CPRI_E0 port. The following section describes the connection using the
CPRI_E0 port.
RHUB as using the CPRI_E0 port. The following section describes the connection using the
CPRI_E0 port.
For details about the cable connections in the different scenarios, see 7.5.3 Cable Connections
(Indoor) and 7.5.4 Cable Connections (Outdoor). The Ethernet cable connections between
RHUB and pRRUs are the same. The following section describes the connections between
RHUB-Extender-pRRU3901 as an example.
(Indoor) and 7.5.4 Cable Connections (Outdoor). The Ethernet cable connections between
RHUB and pRRUs are the same. The following section describes the connections between
RHUB-Extender-pRRU3901 as an example.
In the outdoor scenario, PoE surge protector is needed to provide surge protection for the
Ethernet ports. For details about the installation of PoE surge protector, see 12 (Optional)
Installing the PoE Surge Protector and Cables.
Ethernet ports. For details about the installation of PoE surge protector, see 12 (Optional)
Installing the PoE Surge Protector and Cables.
Procedure
Step 1 Make the Ethernet cables.
1.
Assemble an RJ45 connector and an Ethernet cable by following instructions in
Assembling the Unshielded RJ45 Connector and the Ethernet Cable of Installation
Reference
Assembling the Unshielded RJ45 Connector and the Ethernet Cable of Installation
Reference
.
Follow pin assignment instructions described in section Ethernet Cable in DBS3900 LampSite Hardware
Description
Description
to assemble the unshielded RJ45 connector and the Ethernet cable. Otherwise, the
transmission signal quality deteriorates and CPRI links may be disconnected.
2.
Check whether the made RJ45 connector is qualified by following instructions in
Checking the Appearance of Metal Contact Strips.
Checking the Appearance of Metal Contact Strips.
3.
4.
Check whether the touch points on the connectors at both ends are normally conducted
and well contacted and whether the connections are correct by following instructions in
Testing the Connection of Assembled Cables of Installation Reference.
and well contacted and whether the connections are correct by following instructions in
Testing the Connection of Assembled Cables of Installation Reference.
Step 2 Install an Ethernet cable between an RHUB and a pRRU3901.