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LTTH (LTE-to-the-Home) is a Customer Premises Equipment (CPE), the purpose of which is to
provide the last mile broadband connection to the home using LTE technology. It Consists of an
Indoor Unit (IDU) and Outdoor Unit (ODU).
Indoor and outdoor units are connected together with a wired interface that provides power from
the indoor unit to the outdoor unit as well as the high speed data connection using Power-overEthernet (PoE+).
IDU provides support for
2 GBE LAN ports and 1 GBE WAN Port (PoE+)
2x2 DBDC MIMO WiFi interface - 802.11b/g/n at 2.4 GHz & 802.11 a/n/ac at 5 GHz
USB 3.0 interface via Type C connector
One Tri-color RGB LED for status indication
+54VDC External regulated power connection (Adapter)
Wireless access modules IDU and ODU module are interfaced by means of PoE+ interface. The
outdoor module has LTE communication through which it sends or receives information to the
service provider. The received data is then transmitted to the Indoor Unit for LAN and/or Wi-Fi
Communication.
802.11b/g/n at 2.4 GHz & 802.11a/n/ac at 5 GHz
2x2 DBDC MIMO Internal Antenna configuration
5G frequency range (5.15GHz to 5.25GHz)
Bandwidth: 802.11n with max 40 MHz and 802.11ac with max 80MHz
Transmit power: Max 23dBm branch/chain
Modulation: 2G with 64QAM and 5G with 256QAMTransmit power control (TPC) and Dynamic
Frequency Selection (DFS)
2.3.2 Ethernet
Supports 2 numbers of LAN and 1 number of WAN
Supports IEEE802.3 10BASE-Te, 100BASE-TX and 1000BASE-T
Supports CAT5/5E/6 unshielded twisted pair cable for max 1000Mbps
Supports IEEE802.3az Energy efficient Ethernet
2.3.3 PoE+
WAN Port supports PoE+ PSE as per IEEE802.3 at type-2
Maximum power delivery with 30W (25.4W for PoE+ PD)
2.3.4 USB
Supports Type-C reversible connector
Supports USB3.0 with 5Gbps
Supports legacy USB2.0 devices
Supports 5V@1.5A power outputs
2.3.1 TR-069
Supports device management using TR-069 standard
Supports communication between AP and client
Supports configuration management, diagnostics and monitoring
2.4 Interface/Ports
IDU module has some of User interfaces and indications as shown in below fig.
IDU module has
2 Nos of GbE LAN port
1 No of GbE WAN port with POE+ PSE
1 No of Super speed USB 3.0
Reset switch
+54V DC power input
Multi-color LED indication
Indicates that the CPE has encountered a problem condition
GREEN
Indicates that the CPE is working fine
GREEN Blink
Indicates that a new Firmware Update is available on CPE
WiFi interface (antenna is present internal to the IDU module)
Figure 2-3 Interface Ports of IDU module
2.5 Status LED
IDU has one Multi-color status indication as shown in above fig. LED uses different colors to
indicate the user about different status conditions. The LED is present under the IDU module
which will not provide light pollution until it is purposefully seen.
Separate power supply adapter is used to power the IDU module. The Power supply adapter is
connected to the Main AC power supply which powers the IDU module.
Figure 2-4 Power Supply adapter
Specifications:
Input: 100V-200V AC 50/60Hz
Output: +54V DC output 1.11A
IEEE802.11n MIMO with max 300Mbps
TCP Throughput: 231Mbps
UDP Throughput: 257.53Mbps
IEEE802.11ac MIMO with max 866Mbps
TCP Throughput: 648.2Mbps
UDP Throughput: 728.42Mbps
Notes:
All throughput results are taken under wired and shielded environment.
Attenuation used is 20dBm
TCP throughput is taken using Iperf, Window Size 256k, No. of client streams:8
UDP throughput is taken using Ixia IxNetwork, Packet Length used is 1450 in
case of UDP
All the data rates are in Mbps.
2.7.1.2 Ethernet
IEEE802.3ab; 1000BASE-T with max 1000Mbps (986.5Mbps as per EVM test result)
2.7.1.3 USB
USB3.0 with max 26MBps write and 80MBps read (as per EVM test result)
2.7.2 Power Consumption
Power consumption at idle state: 6.9Watts
Power consumption at all interfaces being exercised: 7.6Watts
Power consumption at full throughput: 10.2Watts
2.8 Compliance statements
FCCID: 2AL7J-FMHRN0002
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including
Interference that may cause undesired operation
FCC Caution!!!
• Any changes or modifications not expressly approved by the party
Responsible for compliance could void the user's authority to operate this
Equipment
• This equipment should be installed and operated with minimum distance
20 cm between the radiator & your body.
This equipment generates, uses and can radiate radio frequency energy
And, if not installed and used in accordance with the instructions, may
Cause harmful interference to radio communications. However, there is no
Guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television
Reception, which can be determined by turning the equipment off and on,
The user is encouraged to try to correct the interference by one or more of
The following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to
Which the receiver is connected
—Consult the dealer or an experienced radio/TV technician for help.
This chapter describes the pre-requisite for LTTH CPE Installation and its step by step installation
procedure and respective dependencies.
3.1 Safety information
Only experienced installation professionals who has complete knowledge on safety codes
and, where applicable, are licensed by the appropriate government regulatory authorities
should install CPE
Use only the allotted power adapter for powering the IDU
Do not POWER ON before assembling the entire setup.
Do not block the air flow from the air vents in the IDU box
3.2 Warning
Do not live insert the adapter to the AC mains when the Main supply is ON
It is recommended to avoid hot plug of the PoE+ WAN connector to the ODU module.
First insert the required cables at the back of the IDU module
Route the cables properly as shown in previous diagrams
Place the IDU module on the table for user access.
3.5.3 Managing CPE using Mobile Management Application
The end user is provided with a Mobile Management Application which can be installed
on Android and iOS mobile devices. The user can perform the following operations on
IDU using this application.
Firmware upgrade of the IDU
Change the following Wi-Fi parameters on IDU
o Change SSID/Wi-Fi Name
o Change Security mode
o Change Wi-Fi password
o Change Wi-Fi channel
o Enable/disable 5Ghz Wi-Fi band
These actions are elaborated more in the following sections.
Note: Details of installation of this application on Android and other devices is out of
scope of this document.
3.5.3.1 CPE Firmware Upgrade
Whenever a new firmware is downloaded to CPE and is available for upgrade,
the Management Application automatically starts showing the below notification.
Figure 3-8 Firmware Update Available Notification
The end user click on the “Update available” button to go to the “Software Update”
screen where an update can be started by clicking on “Restart CPE and Update”
button. This will update the CPE with the latest downloaded software and restart
the CPE.
Figure 3-9 Option - Restart CPE and Update
In case the user does not update Firmware on CPE by clicking “Restart CPE and
Update”, it is be upgraded automatically on next reboot.
3.5.3.2 Wi-Fi Parameters update
Many Wi-Fi parameters for CPE can be updated using the mobile applications.
3.5.3.2.1 Change SSID/Wi-Fi Name
Wi-Fi name (or SSID) can be changed from the “Network Settings” page
where the name next to “Wi-Fi Name” can be changed to the user’s liking.
Any combination of alphanumeric characters (uppercase and lowercase)
up to a maximum length of 32 can be set. It should also be noted that user
can only change the 2.4 GHz band Name. The name for 5 GHz band is
automatically derived this this name. E.g. If 2.4 GHz Name is set to TEST
then the 5 GHz Name is automatically set to TEST-5GHz.
Wi-Fi password can be changed to the user’s liking from the “Security
mode” page. Any combination of alphanumeric characters (min. 8
characters, max. 64 characters) can be set. It should also be noted that
user can only change the 2.4 GHz band password. The password for 5
GHz band is automatically set to the same password.
3.5.3.2.4 Change Wi-Fi channel
Wi-Fi channel can be changed to any of the possible values in the
“NetworkChannel” page. Please note that changing may lead to enhanced
or degraded performance of Wi-Fi and hence should only be changed by
expert/advanced users.
Figure 3-12 Wi-Fi Channel Change
Note: Channel for 5GHz band is auto-selected.
3.5.3.2.5Enable/disable 5 GHz Wi-Fi band
User can also enable or disable the high performance 5GHz Wi-Fi band from
the “Network Settings” page. This band is enabled by default.
Any key is pressed by mistake in CPE console before it reaches to Auto Boot mode.
Indication to user
CPE LED will be stable orange.
How to resolve/fix
Execute ‘sf bflagwr’ command via CPE console and followed by ‘RESET’ command.
4.1.3 CPE registration fails at LTTH-C
Root causes
Wrong HW version or Product Class is mentioned while Registering Product Category at
LTTH-C.
Indication to user
CPE is not present under ‘Find CPE’ tab at LTTH-C.
How to resolve/fix
Rectify HW version or Product Class value while Registering Product Category at LTTHC and Perform CPE Reboot or Factory Reset.
4.1.4 OTA CPE firmware upgrade is not initiated via LTTH-C
Root causes
Wrong HW version or Product Class is mentioned while Registering Product Category at
LTTH-C.
Indication to user
No, CPE LED will be stable green.
How to resolve/fix
Rectify HW version or Product Class value while Registering Product Category at LTTHC and re-initiate CPE firmware upgrade by performing ‘Reconciliation’ operation by LTTHC.
4.1.5 CPE firmware upgrade fails using ‘img_upgrade’ test tool
The ‘img_upgrade’ test tool perform the firmware upgrade in passive partition and
firmware upgrade fails if passive partition is faulty.
Indication to user
CPE will be operational with old firmware build.
How to resolve/fix
Perform CPE firmware upgrade via TFTP server.
4.1.6 CPE firmware activation fails
Root causes
CPE reboot is performed before SW flashing is completed.
Indication to user
CPE will be operational with old firmware build.
How to resolve/fix
Perform CPE reboot only when CPE LED turns to blinking green indicating that SW
flashing is completed and new firmware is ready to be activated. An alternative option is
to perform software activation through Management App when ‘SW update available’
option is appeared on screen.
4.2 Common Problems during Execution Phase
4.2.1 Ethernet station is not able to communicate to CPE on
LAN-1/LAN-2 interface
Root causes
Ethernet station IP address is incorrect.
Indication to user
Ping to CPE (192.168.254.2) will not work.
How to resolve/fix
Go to Network interface settings on Ethernet station and select automatic DHCP option. If
static IP is configured then ensure static IP are in range 192.168.1.101-254 for LAN1 and
5 GHz radio switch is off or client does not support 5GHz band hence will not detect 5Ghz
SSID.
Indication to user
Unable to see 5GHz SSID.
How to resolve/fix
Enable 5 GHz radio via CPE console by executing command “./cpe_ctrl setwlanstatus –s
1” from path /usr/local/bin. Alternatively 5 GHz radio can be enabled via Management
app.
4.2.3 WiFi user not able to connect to CPE due to wrong
password provided
Root causes
User has forgotten the password or password is not known to user.
Indication to user
Not able to connect to CPE
How to resolve/fix
Change password via CPE console by executing command “./cpe_ctrl setwlansmode -m
2
-pwd mypassword” from path /usr/local/bin/. Alternatively perform factory reset and try
connecting using default password.
4.2.4 WiFi/Ethernet client not able to access internet and CPE
LED is blinking orange
Root causes
CPE has lost connectivity with NTE/LTE network.
Indication to user
LED blinking orange and internet is not accessible.
How to resolve/fix
Check PoE cable is properly connected between CPE and NTE. If this is fine then
problem to be looked at operator side.
4.2.5 WiFi/Ethernet client not able to access internet and CPE
You can return the router to its factory settings. Use the end of a paper clip or a similar object to
press and hold the Reset button on the back of the router for at least five seconds.
The router resets and returns to the factory configuration settings shown in the following table,