Cambium Networks PTP 820F User manual

i
Installation Guide
PTP 820F
System Release 10.9

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Accuracy
While reasonable efforts have been made to assure the accuracy of this document, Cambium
Networks assumes no liability resulting from any inaccuracies or omissions in this document, or from
use of the information obtained herein. Cambium reserves the right to make changes to any products
described herein to improve reliability, function, or design, and reserves the right to revise this
document and to make changes from time to time in content hereof with no obligation to notify any
person of revisions or changes. Cambium does not assume any liability arising out of the application
or use of any product, software, or circuit described herein; neither does it convey license under its
patent rights or the rights of others. It is possible that this publication may contain references to, or
information about Cambium products (machines and programs), programming, or services that are
not announced in your country. Such references or information must not be construed to mean that
Cambium intends to announce such Cambium products, programming, or services in your country.
Copyrights
This document, Cambium products, and 3rd Party software products described in this document may
include or describe copyrighted Cambium and other 3rd Party supplied computer programs stored in
semiconductor memories or other media. Laws in the United States and other countries preserve for
Cambium, its licensors, and other 3rd Party supplied software certain exclusive rights for copyrighted
material, including the exclusive right to copy, reproduce in any form, distribute and make derivative
works of the copyrighted material. Accordingly, any copyrighted material of Cambium, its licensors, or
the 3rd Party software supplied material contained in the Cambium products described in this
document may not be copied, reproduced, reverse engineered, distributed, merged or modified in
any manner without the express written permission of Cambium. Furthermore, the purchase of
Cambium products shall not be deemed to grant either directly or by implication, estoppel, or
otherwise, any license under the copyrights, patents or patent applications of Cambium or other 3rd
Party supplied software, except for the normal non-exclusive, royalty free license to use that arises by
operation of law in the sale of a product.
Restrictions
Software and documentation are copyrighted materials. Making unauthorized copies is prohibited by
law. No part of the software or documentation may be reproduced, transmitted, transcribed, stored in
a retrieval system, or translated into any language or computer language, in any form or by any
means, without prior written permission of Cambium.
License Agreements
The software described in this document is the property of Cambium and its licensors. It is furnished
by express license agreement only and may be used only in accordance with the terms of such an
agreement.
High Risk Materials
Cambium and its supplier(s) specifically disclaim any express or implied warranty of fitness for any
high-risk activities or uses of its products including, but not limited to, the operation of nuclear
facilities, aircraft navigation or aircraft communication systems, air traffic control, life support, or
weapons systems (“High Risk Use”). Any High Risk is unauthorized, is made at your own risk and you
shall be responsible for any and all losses, damage or claims arising out of any High-Risk Use.
© 2019 Cambium Networks Limited. All Rights Reserved

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Contents
Contents ............................................................................................................................................................. iii
List of Figures ....................................................................................................................................................v
List of Tables.....................................................................................................................................................vi
What You Should Know........................................................................................................................ vii
Related Documents................................................................................................................................ vii
Contacting Cambium Networks......................................................................................................... vii
Purpose ....................................................................................................................................................... ix
Cross References ..................................................................................................................................... ix
Feedback .................................................................................................................................................... ix
Problems and Warranty ................................................................................................................................ ix
Reporting Problems ................................................................................................................................ ix
Repair and Service................................................................................................................................... ix
Hardware Warranty................................................................................................................................. ix
Security Advice .................................................................................................................................................x
Warnings, Cautions, and Notes....................................................................................................................x
Warnings...................................................................................................................................................... x
Cautions ....................................................................................................................................................... x
Notes.............................................................................................................................................................x
Caring for the Environment ......................................................................................................................... xi
In EU Countries ......................................................................................................................................... xi
Disposal of Cambium Equipment ....................................................................................................... xi
Disposal of Surplus Packaging ............................................................................................................ xi
In non-EU Countries................................................................................................................................ xi
Chapter 1 Before You Start ...................................................................................................................... 2-1
Safety Precautions & Declared Material ............................................................................................... 2-1
General Equipment Precautions ...................................................................................................... 2-1
Précautions générales relatives à l'équipement ......................................................................... 2-2
Allgemeine Vorsichtsmaßnahmen für die Anlage...................................................................... 2-2
Pre-installation Instructions ...................................................................................................................... 2-4
Packing ..................................................................................................................................................... 2-4
Transportation and Storage .............................................................................................................. 2-4
Unpacking................................................................................................................................................ 2-4
Inspection ................................................................................................................................................ 2-5
Chapter 2 PTP 820F Hardware Overview........................................................................................... 2-6
Ethernet Traffic Interfaces......................................................................................................................... 2-6
Ethernet Management Interfaces............................................................................................................ 2-7
Management Interface Cable Options ........................................................................................... 2-8
E1/DS1 Interface ............................................................................................................................................ 2-8
STM-1/OC-3 Interfaces................................................................................................................................ 2-8

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Radio Interfaces ............................................................................................................................................ 2-8
Power Interfaces........................................................................................................................................... 2-9
Synchronization Interface.......................................................................................................................... 2-9
Terminal Interface ........................................................................................................................................ 2-9
External Alarms............................................................................................................................................. 2-9
Storage Memory Card................................................................................................................................. 2-9
Chapter 3 Preparing for Installation ................................................................................................... 3-11
Transportation/Storage ........................................................................................................................... 3-11
Inspection...................................................................................................................................................... 3-11
Unpacking Equipment at the Site ......................................................................................................... 3-11
Chapter 4 Installing the PTP 820F IDU.............................................................................................. 4-13
Kits Required to Perform the Installation........................................................................................... 4-13
Tools ............................................................................................................................................................... 4-13
Installing the PTP 820F IDU in the Rack (19") .................................................................................. 4-13
Grounding the PTP 820F ......................................................................................................................... 4-14
Replacing an PTP 820F IDU or SM-Card ............................................................................................ 4-15
Chapter 5 Connecting the Power Cable............................................................................................ 5-17
Chapter 6 Power Supply Notes ............................................................................................................ 6-19
Chapter 7 IDU-RFU Cable Connection............................................................................................... 7-20
Chapter 8 Performing Initial Configuration...................................................................................... 8-21
Establishing a Connection ....................................................................................................................... 8-21
Connecting to the Unit with a Serial Connection..................................................................... 8-21
Connecting to the Unit with a LAN Connection....................................................................... 8-21
Logging On................................................................................................................................................... 8-22
Changing Your Password ........................................................................................................................ 8-23
Configuration ............................................................................................................................................... 8-24
Chapter 9 Specifications......................................................................................................................... 9-25
Environmental Specifications for IDU.................................................................................................. 9-25
Environmental Specifications for RFU ................................................................................................ 9-25
Mechanical Specifications........................................................................................................................ 9-25
Power Consumption Specifications ..................................................................................................... 9-26
Chapter 10 Acceptance and Commissioning Procedures ......................................................... 10-27
Site Acceptance Procedure .................................................................................................................. 10-27
Site Acceptance Checklist Notes........................................................................................................ 10-31
Radio Link Commissioning Procedure .............................................................................................. 10-32
Scope .................................................................................................................................................... 10-32
Commissioning Test......................................................................................................................... 10-32
PTP 820 Commissioning Log ............................................................................................................... 10-33

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List of Figures
Figure 1: PTP 820F Front Panel and Interfaces...................................................................................................... 2-6
Figure 2: GbE Combo Interface Numbering .............................................................................................................2-7
Figure 3: RFU3/SFP5-6 Interfaces....................................................................................................................................2-7
Figure 4: Management Interface Pin Connections................................................................................................ 2-8
Figure 5: SM Card and Cover .............................................................................................................................................2-10
Figure 6: IDU (Full Configuration) ..................................................................................................................................4-13
Figure 7: Power Supply Grounding................................................................................................................................ 5-17
Figure 8: Correct Wiring of Power Connector........................................................................................................5-18
Figure 9: Connecting the Power Cable .......................................................................................................................5-18
Figure 10: Terminal Interface..............................................................................................................................................8-21
Figure 11: Management Interface ....................................................................................................................................8-22
Figure 12: Login Window .....................................................................................................................................................8-22
Figure 13: Change User Password Page.....................................................................................................................8-23
Figure 14: Quick Configuration – From File Page ..........................................Error! Bookmark not defined.
Figure 15: Quick Configuration – From File Page – Configuration File Loaded .....Error! Bookmark
not defined.

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List of Tables
Table 1 2 x FE Splitter Cable Marketing Model ........................................................................................................ 2-8
Table 2: IDU-RFU Cable Connection ............................................................................................................................7-20
Table 3: IDU Mechanical Specifications......................................................................................................................9-25

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About This Installation Guide
This guide describes the PTP 820F installation procedures. This guide also provides initial
configuration instructions for once the hardware installation is complete.
This guide contains the following chapters:
Chapter 1: Before You Start
Chapter 2: PTP 820F Hardware Overview
Chapter 3:Preparing for Installation
Chapter 4:Installing the PTP 820F IDU
Chapter 5: Connecting the Power Cable
Chapter 6: Power Supply Notes
Chapter 7: IDU-RFU Cable Connection
Chapter 8: Performing Initial Configuration
Chapter 9:Specifications
Chapter 10: Acceptance and Commissioning Procedures
What You Should Know
A PTP 820F system consists of an PTP 820F indoor unit (IDU) and one or more radio frequency
units (RFUs). This manual provides instructions for the installation of the PTP 820F IDU only. Some
features described in this manual may not be available in the current release. Consult the Release
Notes for the functionality supported in the specific release you are using.
Related Documents
•PTP 820F Technical Description
•User Guide for PTP 820F, and PTP 820G
•PTP 820 Series MIB Reference
•RFU-D Installation Guide
•RFU-S Installation Guide
•RFU-D-HP Installation Guide
Contacting Cambium Networks
Support website: http://www.cambiumnetworks.com/support
Main website: http://www.cambiumnetworks.com
Sales enquiries: [e-mail]
Support enquiries: [e-mail]
Repair inquiries [e-mail]

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Telephone number list: http://www.cambiumnetworks.com/support/contact-support
Address: Cambium Networks Limited,
Linhay Business Park,
Eastern Road,
Ashburton,
Devon, UK,
TQ13 7UP

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Purpose
Cambium Networks Point-To-Point (PTP) documents are intended to instruct and assist personnel in
the operation, installation and maintenance of the Cambium PTP equipment and ancillary devices. It
is recommended that all personnel engaged in such activities be properly trained.
Cambium disclaims all liability whatsoever, implied or express, for any risk of damage, loss or
reduction in system performance arising directly or indirectly out of the failure of the customer, or
anyone acting on the customer's behalf, to abide by the instructions, system parameters, or
recommendations made in this document.
Cross References
References to external publications are shown in italics. Other cross references, emphasized in blue
text in electronic versions, are active links to the references.
This document is divided into numbered chapters that are divided into sections. Sections are not
numbered but are individually named at the top of each page and are listed in the table of contents.
Feedback
We appreciate feedback from the users of our documents. This includes feedback on the structure,
content, accuracy, or completeness of our documents. Send feedback to
[e-mail].
Problems and Warranty
Reporting Problems
If any problems are encountered when installing or operating this equipment, follow this procedure
to investigate and report:
1
Search this document and the software release notes of supported releases.
2
Visit the support website.
3
Ask for assistance from the Cambium product supplier.
4
Gather information from affected units, such as any available diagnostic downloads.
5
Escalate the problem by emailing or telephoning support.
Repair and Service
If unit failure is suspected, obtain details of the Return Material Authorization (RMA) process from
the support website.
Hardware Warranty
Cambium’s standard hardware warranty is for one (1) year from date of shipment from Cambium
Networks or a Cambium distributor. Cambium Networks warrants that hardware will conform to the
relevant published specifications and will be free from material defects in material and workmanship
under normal use and service. Cambium shall within this time, at its own option, either repair or
replace the defective product within thirty (30) days of receipt of the defective product. Repaired or
replaced product will be subject to the original warranty period but not less than thirty (30) days.

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To register PTP products or activate warranties, visit the support website. For warranty assistance,
contact the reseller or distributor.
Caution
Using non-Cambium parts for repair could damage the equipment or void warranty.
Contact Cambium for service and repair instructions.
Portions of Cambium equipment may be damaged from exposure to electrostatic
discharge. Use precautions to prevent damage.
Security Advice
Cambium Networks systems and equipment provide security parameters that can be configured by
the operator based on their particular operating environment. Cambium recommends setting and
using these parameters following industry recognized security practices. Security aspects to be
considered are protecting the confidentiality, integrity, and availability of information and assets.
Assets include the ability to communicate, information about the nature of the communications, and
information about the parties involved.
In certain instances Cambium makes specific recommendations regarding security practices,
however the implementation of these recommendations and final responsibility for the security of
the system lies with the operator of the system.
Warnings, Cautions, and Notes
The following describes how warnings and cautions are used in this document and in all documents
of the Cambium Networks document set.
Warnings
Warnings precede instructions that contain potentially hazardous situations. Warnings are used to
alert the reader to possible hazards that could cause loss of life or physical injury. A warning has the
following format:
Warning
Warning text and consequence for not following the instructions in the warning.
Cautions
Cautions precede instructions and are used when there is a possibility of damage to systems,
software, or individual items of equipment within a system. However, this damage presents no
danger to personnel. A caution has the following format:
Caution
Caution text and consequence for not following the instructions in the caution.
Notes
A note means that there is a possibility of an undesirable situation or provides additional information
to help the reader understand a topic or concept. A note has the following format:

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Note
Note text.
Caring for the Environment
The following information describes national or regional requirements for the disposal of Cambium
Networks supplied equipment and for the approved disposal of surplus packaging.
In EU Countries
The following information is provided to enable regulatory compliance with the European Union
(EU) directives identified and any amendments made to these directives when using Cambium
equipment in EU countries.
Disposal of Cambium Equipment
European Union (EU) Directive 2002/96/EC Waste Electrical and Electronic Equipment (WEEE)
Do not dispose of Cambium equipment in landfill sites. For disposal instructions, refer to
http://www.cambiumnetworks.com/support
Disposal of Surplus Packaging
Do not dispose of surplus packaging in landfill sites. In the EU, it is the individual recipient’s
responsibility to ensure that packaging materials are collected and recycled according to the
requirements of EU environmental law.
In non-EU Countries
In non-EU countries, dispose of Cambium equipment and all surplus packaging in accordance with
national and regional regulations.

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Chapter 1 Before You Start
Safety Precautions & Declared Material
General Equipment Precautions
Caution
To avoid malfunctioning or personnel injuries, equipment or accessories/kits/plug-in unit
installation, requires qualified and trained personnel. Changes or modifications not
expressly approved by Cambium Networks could void the user's authority to operate the
equipment.
Caution
Where special cables, shields, adapters and grounding kits are supplied or described in this
manual, these items must be used, to comply with the FCC regulations.
Caution
Use of controls, adjustments, or performing procedures other than those specified herein,
may result in hazardous radiation exposure.
Caution
When working with an RFU-S, note the following risk of electric shock and energy hazard:
Disconnecting one power supply disconnects only one power supply module. To isolate
the unit completely, disconnect all power supplies.
Caution
Machine noise information order - 3. GPSGV, the highest sound pressure level amounts to
70 dB (A) or less, in accordance with ISO EN 7779.
Anti Static
Static electricity may cause body harm, as well as harm to electronic components inside
the device. Anyone responsible for the installation or maintenance of the RFU-D must
use an ESD Wrist Strap. ESD protection measures must be observed when touching the
unit. To prevent damage, before touching components inside the device, all electrostatic
must be discharged from both personnel and tools.

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Caution
In Norway and Sweden:
Equipment connected to the protective earthing of the building installation through the
mains connection or through other equipment with a connection to protective earthing –
and to a cable distribution system using coaxial cable, may in some circumstances create a
fire hazard. Connection to a cable distribution system has therefore to be provided
through a device providing electrical isolation below a certain frequency range (galvanic
isolator, see EN 60728-11).
Utstyr som er koplet til beskyttelsesjord via nettplugg og/eller via annet jordtilkoplet
utstyr – og er tilkoplet et kabel-TV nett, kan forårsake brannfare. For å unngå dette skal
det ved tilkopling av utstyret til kabel-TV nettet installeres en galvanisk isolator mellom
utstyret og kabel- TV nettet.
Utrustning som är kopplad till skyddsjord via jordat vägguttag och/eller via annan
utrustning och samtidigt är kopplad till kabel-TV nät kan i vissa fall medfőra risk főr brand.
Főr att undvika detta skall vid anslutning av utrustningen till kabel-TV nät galvanisk
isolator finnas mellan utrustningen och kabel-TV nätet.
Précautions générales relatives à l'équipement
Caution
L’utilisation de commandes ou de réglages ou l'exécution de procédures autres que celles
spécifiées dans les présentes peut engendrer une exposition dangereuse aux
rayonnements.
Caution
L’usage de RFU-S s’accompagne du risque suivant d'électrocution et de danger électrique :
le débranchement d'une alimentation électrique ne déconnecte qu'un module
d'alimentation électrique. Pour isoler complètement l'unité, il faut débrancher toutes les
alimentations électriques.
Caution
Bruit de machine d’ordre - 3. GPSGV, le plus haut niveau de pression sonore s'élève à 70
dB (A) au maximum, dans le respect de la norme ISO EN 7779.
Allgemeine Vorsichtsmaßnahmen für die Anlage
Caution
Wenn andere Steuerelemente verwendet, Einstellungen vorgenommen oder Verfahren
durchgeführt werden als die hier angegebenen, kann dies gefährliche Strahlung
verursachen.
Caution
Beachten Sie beim Arbeiten mit RFU-S das folgende Stromschlag- und Gefahrenrisiko:
Durch Abtrennen einer Stromquelle wird nur ein
Caution
Stromversorgungsmodul abgetrennt. Um die Einheit vollständig zu isolieren, trennen Sie
alle Stromversorgungen ab.
Maschinenlärminformations-Verordnung - 3. GPSGV, der höchste Schalldruckpegel beträgt
70 dB(A) oder weniger gemäß EN ISO 7779.

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ESD
This equipment contains components which are sensitive to "ESD" (Electro Static
Discharge). Therefore, ESD protection measures must be observed when touching the IDU.
Anyone responsible for the installation or maintenance of the IDU must use an ESD Wrist
Strap.
Additional precautions include personnel grounding, grounding of work bench, grounding of
tools and instruments as well as transport and storage in special antistatic bags and boxes.
Laser
Use of controls or adjustments or performance of procedures other than those
specified herein may result in hazardous radiation exposure.
The optical interface must only be serviced by qualified personnel, who are aware of
the hazards involved to repair laser products.
When handling laser products the following precautions must be taken:
•Never look directly into an open connector or optical cable.
•Before disconnecting an optical cable from the optical transmitter, the power should be
switched off. If this is not possible, the cable must be disconnected from the transmitter before
it is disconnected from the receiver.
•When the cable is reconnected, it must be connected to the receiver before it is connected to
the transmitter.
Grounding: This equipment is designed to permit connection between the earthed conductor of the
DC supply circuit and the earthing conductor at the equipment.
Restricted Access Area: DC powered equipment should only be installed in a Restricted Access
Area.
Installation Codes: The equipment must be installed according to country national electrical codes.
For North America, equipment must be installed in accordance to the US National Electrical Code,
Articles 110-16, 110-17 and 110-18, and the Canadian Electrical Code, Section 12.
Overcurrent Protection: A readily accessible listed branch circuit overcurrent protective device,
rated 15 A, must be incorporated in the building wiring.
Grounded Supply System: The equipment shall be connected to a properly grounded supply
system. All equipment in the immediate vicinity shall be grounded the same way, and shall not be
grounded elsewhere.
Local Supply System: The DC supply system is to be local, i.e. within the same premises as the
equipment.
Note
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.

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Disconnect Device: A disconnect device is not allowed in the grounded circuit between the DC
supply source and the frame/grounded circuit connection.
RoHS Compliance Declaration
Caution
Electronic Information Products Declaration of Hazardous/Toxic Substances
Pre-installation Instructions
Packing
The equipment must be packed and sealed in moisture absorbing bags.
Transportation and Storage
The equipment cases are prepared for shipment by air, truck, railway and sea, suitable for handling
by forklift trucks and slings. The cargo must be kept dry during transportation, in accordance with
ETS 300 019-1-2, Class 2.3. For sea-transport, deck-side shipment is not permitted. Carrier-owned
cargo containers should be used.
It is recommended that the equipment be transported to the installation site in its original packing
case.
If intermediate storage is required, the packed equipment must be stored in a dry and cool
environment, and out of direct sunlight, in accordance with ETS 300 019-1-1, Class 1.2.
Unpacking
The equipment is packed in sealed plastic bags and moisture absorbing bags are inserted. Any
separate sensitive product, i.e. printed boards, are packed in anti-static handling bags. The
equipment is further packed in special designed cases.
Marking is done according to standard practice unless otherwise specified by customers. The
following details should be marked:
•Customers address
•Contract No
•Site name (if known)
•Case No
Component
Hazardous Substance
Lead (Pb)
Mercury
(Hg)
Cadmium
(Cd)
Hexavalent
Chromium
(Cr VI)
Polybromi
nated
Biphenyls
(PBB)
Polybrominated
Diphenyl Ethers
(PBDE)
PCB/Circuit
Modules
Comply Comply Comply Comply Comply Comply
Mechanical
Parts
Comply Comply Comply Comply Comply Comply
Cables Comply Comply Comply Comply Comply Comply

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Inspection
Check the packing lists and ensure that correct parts numbers quantities of goods have arrived.
Inspect for any damage on the cases and equipment. Please report any damage or discrepancy to
Cambium Networks support by e-mailing to [e-mail].

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Chapter 2 PTP 820F Hardware Overview
PTP 820F is a compact unit that fits in a single rack unit, with a passive cooling system that
eliminates the need for fans. A PTP 820F system consists of a PTP 820F indoor unit (IDU) and up to
three radio frequency units (RFUs). The IDU is connected to each RFU by a standard Cat-5e or
preferably Cat-6/6e cable, with RF-45 connectors on the RFU and electrical or optical fiber via SFP
on the IDU. This cable transmits traffic and management data between the IDU and the RFU. For
RFU-S and RFU-D connected to an electrical RFU interface on the IDU, this cable also provides DC -
48V power to the RFU. For RFU-S or RFU-D using an optical fiber connection, and for RFU-D-HP
using an electrical or optical fiber connection, an external DC power cable is required.
A PTP 820F IDU contains:
•Three 1 GbE combo interfaces
•Two dual mode GbE or cascading combo interfaces
•Two combo (RJ-45 or SFP) radio interfaces
•An additional interface that can be configured as a combo (RJ-45 or SFP) radio interface or a 1
GbE interface
For TDM traffic, a PTP 820F IDU includes a 16 x E1/DS1 interface and two STM 1/OC-3 interfaces that
require the addition of an optional rear-mounted STM-1/OC-3 module. The STM-1/OC-3 interfaces
can be used in a 1+1 STM 1/OC 3 protection configuration.
The IDU also includes two FE management interfaces, a DB9 dry contact external alarms interface,
and an RJ-45 terminal console interface for connection to a local craft terminal. Optionally, one of
the FE management interfaces can be used as an RJ-45 synchronization interface.
PTP 820F receives an external supply of -48V, with a dual-feed option for power redundancy.
Figure 1PTP 820F Front Panel and Interfaces
Ethernet Traffic Interfaces
The front panel of the PTP 820F contains 4 x GbE combo interfaces (electrical or optical) for
Ethernet traffic. These interfaces are numbered as shown in Figure 2.

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Figure 2GbE Combo Interface Numbering
GbE 1/SFP 1 and GbE 2/SFP 2 can be configured as normal Ethernet traffic interfaces or as
cascading interfaces. When operating in cascading mode, these interfaces can handle hybrid
Ethernet and Native TDM traffic, enabling operators to create links among multiple PTP 820 units in
a node for multi-directional applications based on hybrid Ethernet and Native or pseudowire TDM
services.
In addition, two pairs of electrical and optical interfaces towards the right of the front panel can be
used to provide either two Ethernet interfaces or one Ethernet interface and one radio interface:
•RFU3/SFP5 and RFU3/2.5GE5 – A combo interface that can be used as either an SFP or RJ-45
RFU interface or an SFP or RJ-45 Ethernet interface.
•SFP6/2.5GE6 - A combo interface (SFP or RJ-45) for Ethernet.
Figure 3 RFU3/SFP5-6 Interfaces
Ethernet Management Interfaces
PTP 820F contains two FE management interfaces, which connect to a single RJ-45 physical
connector on the front panel. The RJ-45 connector is the upper RJ 45 interface in a pair of
interfaces labeled MGMT/SYNC.
Note
When using electrical ports GbE 1 through GbE 4 to connect between the PTP 820F IDU
and an outdoor unit such as PTP 820C or PTP 820S, in areas in which severe lightning
conditions are likely to occur, it is required to use lightning protection.

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Figure 4 Management Interface Pin Connections
Management Switch
TX+
TX-
RX+
RX-
TX+
TX-
RX+
RX-
Port 1
Port 2
1
2
3
4
5
6
7
8
RJ-45 Connector
(female)
Management Interface Cable Options
If the user only needs to use a single management interface, a standard Cat5 RJ-45 cable (straight
or cross) can be connected to the MGMT interface.
To access both management interfaces, a special 2 x FE splitter cable can be ordered from
Cambium.
Table 1 2 x FE Splitter Cable Marketing Model
Part Number
Description
N000082L122A PTP 820G Ethernet split cable for Management
E1/DS1 Interface
PTP 820F includes an MDR69 connector in which 16 E1 interfaces are available (ports 1 through 16).
STM-1/OC-3 Interfaces
The PTP 820F includes two ch-STM-1/OC-3 ports, which can be used as a 1+1 STM-1/OC-3 protection
configuration. The STM-1/OC-3 port provides an interface for up to 63 E1 or 84 DS1 lines inside a
standard channelized STM-1 or OC-3 signal. Each E1/DS1 line is transported by a VC-12 container,
which behaves like a regular line interface.
Radio Interfaces
PTP 820F includes two combo radio interfaces (RJ-45 or SFP, RFU1 and RFU2). A third interface can
also be used as a combo radio interface (RJ-45 or SFP, RFU3).
Note
STM-1/OC-3 requires the addition of an optional rear-mounted STM-1/OC-3 module, which
is planned for future release.

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Power Interfaces
PTP 820F receives an external supply of -48V current via a dual-feed power interface, which can be
connected to two separate power sources for power redundancy. The PTP 820F monitors the power
supply for under-voltage and includes reverse polarity protection, so that if the positive (+) and
negative (-) inputs are mixed up, the system remains shut down.
The allowed power input range for the PTP 820F is -40V to -60V. An under-voltage alarm is
triggered if the power goes below the allowed range, and an over voltage alarm is triggered if the
power goes above the allowed range.
Synchronization Interface
PTP 820F includes an RJ-45 synchronization interface for T3 clock input and T4 clock output. The
interface is the lower RJ-45 interface in a pair of interfaces labeled MGMT/SYNC.
Terminal Interface
PTP 820F includes an RJ-45 terminal interface (RS-232). A local craft terminal can be connected to
the terminal interface for local CLI management of the unit.
External Alarms
PTP 820F includes a DB9 dry contact external alarms interface. The external alarms interface
supports five input alarms and a single output alarm.
The input alarms are configurable according to:
1. Intermediate
2. Critical
3. Major
4. Minor
5. Warning
The output alarm is configured according to predefined categories.
Storage Memory Card
Each PTP 820F unit includes a Storage Memory card (SM card). The SM card holds the configuration
and software for the IDU. The SM-Card is embedded in the SM-Card plastic cover that is located
under the SM-card aluminum cover. In the event of IDU replacement, re-using the existing SM card
cover is necessary to ensure that the unit’s software and configuration is maintained.
An SM card is pre-installed inside each PTP 820F unit. It can also be ordered as a separate item (e.g.,
as a spare unit).
Note
For some RFUs, PoE power can be supplied directly from the IDU via an RJ-45 radio
interface. See IDU-RFU Cable Connection.