Positron GAM-4-CRX User manual

G.hn Access Multiplexer (GAM)
Quick Installation Guide
GAM-4-CRX / GAM-4-CX

GAM Quick Installation Guide
Positron Access Solutions 2 Document 180-0212-001 R02
Publication Information
©2021 Positron Access Solutions
GAM (G.hn Access Multiplexer) GAM-4-CRX / GAM-4-CX
Quick Installation Guide
Publication date: Updated November 2021
Printed in Canada
Published By
Positron Access Solutions
5101 Buchan Street, Suite 220
Montreal, Quebec, Canada
H4P 2R9
Telephone US and Canada: 1-888-577-5254
International: [phone]
Product names, other than Positron's, mentioned herein may be trademarks and/or registered trademarks
their respective companies.
Disclaimer Notice
Although Positron Access Solutions has made every effort to ensure the accuracy of the information
contained herein, this document is subject to change.

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CONTENTS
Chapter 1.........................................................................................................................................5
About the GAM...............................................................................................................................5
1.1 Introduction........................................................................................................................6
1.2 GAM Connections.............................................................................................................6
1.2.1 Power Connection........................................................................................................6
1.2.2 Ethernet (SFP+) Port ...................................................................................................7
1.2.3 G.hn Ports....................................................................................................................8
1.2.4 Local management ports .............................................................................................8
1.2.5 GAM LED Indicators ....................................................................................................9
1.2.6 GAM Reset Button.....................................................................................................11
Chapter 2.......................................................................................................................................12
Step by Step Installation .............................................................................................................12
2.1 Step by Step Installation Procedure................................................................................13
Chapter 3.......................................................................................................................................19
WEB Management........................................................................................................................19
3.1 Introduction......................................................................................................................20
3.2 System Management ......................................................................................................20
3.2.1 Logging into the WEB GUI.........................................................................................20
3.2.2 System.......................................................................................................................21
3.2.3 General Information ...................................................................................................21
Chapter 4.......................................................................................................................................22
Technical Specifications .............................................................................................................22
4.1 GAM Technical Specifications ........................................................................................23
Chapter 4.......................................................................................................................................27
Safety and Warnings....................................................................................................................27
Chapter 5.......................................................................................................................................30
Warranty and Customer Service ................................................................................................30

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List of Figures
FIGURE 1:GAM-4-CR LOCAL POWER INPUT CONNECTOR...........................................................................................7
FIGURE 2:GAM SFP+ CONNECTORS.......................................................................................................................7
FIGURE 3: F-TYPE CONNECTORS ..............................................................................................................................8
FIGURE 4: LOCAL MANAGEMENT PORTS ARE AT THE TOP RIGHT CORNER OF THE GAM CIRCUITRY........................................8
FIGURE 5: GAM SERIAL MANAGEMENT PORT PINOUT ................................................................................................9
FIGURE 6: GAM GLOBAL STATUS LEDS....................................................................................................................9
FIGURE 7: G.HN PORTS LEDS...............................................................................................................................10
FIGURE 8: SFP+ LED..........................................................................................................................................10
FIGURE 9: GAM RESET (RST) BUTTON ..................................................................................................................11
FIGURE 10: GAM LOGIN PAGE (BROWSER SPECIFIC)................................................................................................20
FIGURE 11: GAM PORT STATUS PAGE (DEFAULT PAGE AFTER LOGIN)...........................................................................21
List of Tables
TABLE 1: GAM GLOBAL LED INDICATORS.................................................................................................................9
TABLE 2: G.HN PORTS LED INDICATORS .................................................................................................................10
TABLE 3: SFP+ LED INDICATOR ............................................................................................................................11
TABLE 4: GAM DEFAULT CREDENTIALS ...................................................................................................................20
TABLE 5: GAM SUMMARY FEATURES ....................................................................................................................26

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Chapter 1
______________________________________
About the GAM

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1.1 Introduction
The GAM is a Fiber to the Distribution Point (FTTDp) solution typically installed
inside a wiring closet. The GAM-4-CRX and GAM-4-CX come with one (1) 10
Gigabit SFP+ interfaces to support any type of fiber or PON standards (using an
SFP-based or external ONT as required that is compatible with the OLT).
The ITU-T G.9960 G.hn Wave-2 standard leverages the existing telephone wiring
(UTP, CAT-3 or CAT-5/5e) or RG-6/RG-59 coax cabling to deliver a Gigabit
Internet service to each subscriber without the cost, complexity and delays
associated with in-building fiber installation. G.hn is an Access technology for
Operators looking to simplify their access network and backend infrastructure with
an Ethernet-like technology that is highly scalable without some of the inherent
complexity of DSL-related technologies. With G.hn, Operators deliver advanced
services such as Gigabit High Speed Residential Internet and 4K IPTV without the
high capital and operational expenses associated with a fiber retrofit. Each G.hn
subscriber port supports up to 1.7 Gbps of dynamically allocated bandwidth for
near symmetrical Gigabit services over the existing telephone wire or coaxial
cable. The Positron GAM solution is MEF CE 2.0 compliant and is ideally suited to
deliver Business Ethernet services in an MDU and/or MTU deployment.
Note: Read Chapter 4 Safety and Warnings before proceeding.
1.2 GAM Connections
This section provides an overview of the connectors inside the GAM-4-CRX and
GAM-4-CX. Please refer to section 2 for a detailed step-by-step installation
procedure.
1.2.1 Power Connection
The GAM-4-CRX is Reverse Power Fed (from G1001-CR endpoint devices) while
the GAM-4-CX is locally powered. There must be at least one (1) G1001-CR
device per G.hn coax port of a GAM-4-CRX that is serving customers. Other
subscribers can then use a G1001-CR or a G1001-C/G1000-C as needed.

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Figure 1: GAM-4-CR Local Power Input Connector
1.2.2 Ethernet (SFP+) Port
Figure 2: GAM SFP+ Connectors
The GAM has one (1) SFP+ ports that support any MSA-compliant SFP/SFP+
modules. (Fiber: 1G, 10G and Copper RJ-45: 100M, 1G).
Important note: When connecting the SFP+ port to a Passive Optical Network
(PON) fiber connection, please make sure to use an Optical Network Unit (ONU)
approved by the OLT vendor you are using.
12Vdc power connector
SFP+ connector cage

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1.2.3 G.hn Ports
The GAM-4-CRX and GAM-4-CX have 4 F-type coaxial connectors.
Figure 3: F-type connectors
1.2.4 Local management ports
The GAM devices have two (2) local management ports located near the top right
corner of the enclosure.
Figure 4: Local Management Ports are at the top right corner of the GAM circuitry
The CRAFT port is a standard serial (V.24, 115200, 8, N, 1)) port that provides
access to the command line interface of the GAM device.
The pinout of the RJ-45 serial port is compatible with the popular Cisco pinout as
per the following diagram:
Craft (serial) port
Gigabit Ethernet
Management port
COAX F-type
Connectors

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Figure 5: GAM Serial Management Port pinout
The MGMT port is a 10/100/1000Base-T Ethernet port provides access to the WEB
GUI interface using a standard WEB browser or an SSH interface to the command
line interface of the GAM device.
1.2.5 GAM LED Indicators
The GAM uses three (3) LED indicators inserted in the cover of the IP67 enclosure
to provide information about its global status and operating mode.
Figure 6: GAM global status LEDs
LED
Condition
Function
RPF
Off
On
Always OFF for the GAM-4-CX
since it does not support a
Reverse Power Feed
SRV
Solid Green
Solid Yellow
Solid Red
System OK
GAM is starting up
No Internet Connection
STA
Solid Green
Solid Yellow
Blinking Yellow
Solid Red
Normal
Minor Alarm Active
Firmware Update in Progress
Critical or Major Alarm Active
Table 1: GAM Global LED indicators

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Each of the G.hn ports has two (2) status LEDs.
Figure 7: G.hn Ports LEDs
The top row of LEDs indicates the state of the G.hn link while the bottom row
indicates the presence of the Reverse Power Feed source (from a G1001-CR
device at the customer end).
LED
Condition
Function
G.hn ports
Off
Blinking
On
Disabled or Link Down
Bad or low speed G.hn link
Link is Up
G.hn port power
Off
Green
Always ON for the GAM-4-CX
since it is locally powered
Table 2: G.hn Ports LED indicators
The SFP+ port of the GAM has a dedicated status LED located near the top of the
PCB, to the right of the G.hn LEDs.
Figure 8: SFP+ LED
G.hn Port LEDs
SFP+ LED

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LED
Condition
Function
Located under SFP+
connector
Off
Green
Blinking green
Disabled or Link is Down
Link is Up
Link Activity
Table 3: SFP+ LED indicator
1.2.6 GAM Reset Button
Press the RST button to reset the GAM. When depressed for two (2) to ten (10)
seconds, it will perform a cold reboot of the GAM. When depressed for more than
ten (10) seconds, it will return the GAM device to its original factory default settings
and will perform a cold reboot of the GAM.
Figure 9: GAM Reset (RST) button
RESET
button/

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Chapter 2
______________________________________
Step by Step Installation

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2.1 Step by Step Installation Procedure
Here is a step-by-step procedure to install the GAM-4-CRX and GAM-4-CX
outdoor unit.
Begin by connecting the AC-DC Power supply included as part of your GAM-4-CX.
You should skip this step if you are using a Reverse Power Fed GAM-4-CRX
unless you plan to temporarily power the GAM for a temporary 12Vdc power
source during the initial installation / activation of the unit.
Step 1: The 12Vdc connector is located at the
top right corner of the GAM enclosure. Pull on
the male power connector that ships pre-
installed in unit.
/

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Step 2: using 18 AWG wire, insert the power
cable through the rightmost cable gland. You
can then connect the 12Vdc power pair to the
male power connector and tighten with a small
flat screwdriver.
Step 3: insert the male power connector into
the female receptacle. You can now connect
the other end of the 12Vdc / 4A adapter to the
local 110-220VAC power source.
The next step is the insertion of the SFP or SFP+ module that provides the uplink
connection.
Step 4: Insert the SFP or SFP+ module into the
SFP cage at the top right section of the GAM
enclosure. Make sure to lock the SFP / SFP+
module in place.
Note: the SFP cage can accommodate
modules that draw up to 3W of power.

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Step 5: install the fiber patch cable around the
fiber spool as per the fiber cable provider
guidelines. Make sure you have enough length
to reach the SFP cage while routing the fiber
cable above the 2 x RJ-45 ports at the top right
of the GAM enclosure.
Step 6: insert the fiber connectors into the SFP
/ SFP+ module. Note: while an LC patch cable
is shown here, you can also use an SC patch
cable or a copper (CAT-5/6e) when using a
copper SFP.
Step 7: make sure you carefully route the fiber
patch above and around the internal mini-COAX
cables.

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You are now ready to install the ground wire into the ground lug at the bottom right
edge of the GAM enclosure.
Step 8: insert the 6 AWG ground wire into the
ground lug.
Step 9: use a 4 mm Allen (hex) key to secure
the ground wire.

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You are now ready to securely fasten the cover back onto the enclosure.
Step 10: use a 5 mm Allen (hex) key to secure
the 4 screws to ensure the IP67 water
protection of the enclosure. Tighten the screws
in an X fashion (top-right, bottom-left, top left,
bottom right).
You can now connect the coaxial cable(s) to the F-type COAX connectors of the
unit.
Step 11: remove the protective cap on the F-
type connector(s) where you will attach a
coaxial cable.
Step 12: securely fasten the F-type connector
to the coaxial cable
The final step is the installation of the mounting bracket. The mounting bracket
included with the GAM enclosure facilitates installation on a pole or a flat surface.
You can also strand-mount the device using the optional GAM-STRAND-KIT
adapter.

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Step 13: the top and bottom brackets are
identical. Using the Phillips screws supplied
with the unit to fasten the bracket on the back
side of the enclosure.
Step 14:Once both brackets are attached to
the enclosure, you are ready to install the unit at
its definitive location.

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Chapter 3
______________________________________
WEB Management

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3.1 Introduction
A WEB GUI interface and a Command Line Interface (CLI) are available to manage
GAM devices. Supported WEB browsers include Chrome, Edge, or Firefox.
3.2 System Management
3.2.1 Logging into the WEB GUI
The default configuration values of the GAM devices are:
IP Address
192.168.10.1
Subnet Mask
255.255.255.0
Username
admin
Password
Table 4: GAM default credentials
Enter the system's IP Address into the Web browser and a login screen similar to
the following will appear:
Figure 10: GAM Login Page (Browser specific)
Enter a Username and Password for the GAM device. The default Username is
admin and the default password is null (not defined). Click OK.