Retail Store Connectivity — Failover Configuration Guide

1. Document Information

• Product Model: FWA02 (5G Fixed Wireless Access Router)
• Firmware Version: V1.0 or later
• Applicable Scenario: Chain retail store connectivity, WAN + 5G cellular failover
• Document Date: April 27, 2026

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2. Router Overview

2.1 Product Introduction

The InHand FWA02 is a 5G fixed wireless access router designed for plug-and-play deployment in distributed retail environments. It supports dual-link failover between a wired WAN connection and a 5G/4G cellular backup, ensuring uninterrupted business operations for POS transactions, video surveillance, and data synchronization.

2.2 Key Features (Failover-Related)

• Wired WAN as primary link with automatic 5G/4G cellular failover
• Dual Nano SIM + eSIM for flexible carrier selection on the cellular backup link
• Real-time link quality monitoring: latency, jitter, packet loss, and cellular signal strength
• Sub-30-second failover detection and switchover

2.3 Typical Application Topology

Figure 1 — Each retail store has one FWA02 connecting all in-store devices. The wired WAN carries all normal traffic; the 5G cellular link activates automatically when the wired link degrades or fails. The device is also reachable from HQ and InCloud Manager over the internet.

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3. Hardware Description

3.1 Interfaces

Interface	Description
ETH 1 / ETH 2	2 × 2.5 GbE RJ45, WAN/LAN switchable
SIM 1 / SIM 2	Nano SIM slots (hot-plug), primary and backup cellular
eSIM	Embedded SIM for pre-provisioned carrier profile
USB	Type-C, USB 2.0, HOST and SLAVE modes
Power	Circular interface, 12 V 2 A
Reset	Recessed button, restores factory defaults
Power switch	Hardware on/off button
Antenna	6 × external Sub-6 GHz cellular antennas; 4 × built-in Wi-Fi antennas

3.2 LED Indicators (Failover-Relevant)

Indicator	Status	Meaning
System	Solid green	Device operating normally
	Blinking	Booting or upgrading
Cellular	Solid green	Cellular connected
	Blinking	Cellular registering
	Off	No SIM / no signal
Signal	1–5 bars	Cellular signal strength
WAN	Solid green	WAN link up
	Off	WAN link down

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4. Factory Default Parameters

Parameter	Default Value
LAN IP address	192.168.1.1
Subnet mask	255.255.255.0
DHCP server	Enabled (pool: 192.168.1.100–199)
Web UI username	adm
Web UI password	Printed on device label
ETH 1	WAN mode (default)
ETH 2	LAN mode (default)

Note: The device label on the underside of the unit shows the default web UI password. Change this on first login.

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5. Pre-Configuration Requirements

Before starting configuration, ensure the following:

1. Insert SIM card(s) into SIM 1 (and optionally SIM 2) slots
2. Connect the active broadband modem or ISP handoff to ETH 1 (WAN) using an Ethernet cable
3. Connect your PC to ETH 2 (LAN) using an Ethernet cable
4. Power on the FWA02 using the 12 V adapter; wait for the System LED to turn solid green (approx. 60 seconds)
5. Set your PC to obtain an IP address automatically (DHCP), or configure a static IP in the 192.168.1.0/24 subnet
6. Open a supported web browser (Chrome, Firefox, or Edge) and navigate to http://192.168.1.1
7. Log in with the credentials on the device label

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6. Failover Configuration

6.1 Background and Requirements

Each retail store requires: - A primary wired WAN connection for normal high-bandwidth operations - An automatic 5G/4G cellular failover that activates when the wired link fails - Continuous monitoring of link quality so that switchover is triggered before business impact occurs

On the FWA02, both the WAN and Cellular interfaces appear as entries in the Uplink Table under the Internet menu. Failover behavior is then defined in the Uplink Setting section on the same page.

6.2 Step 1 — Review the Uplink Table

1. Log in to the router Web UI at http://192.168.1.1
2. In the left navigation, click Internet
3. The Uplink Table lists all available uplinks. By default you should see two entries:

Priority	Name	Status	Interface Type	IPv4 Type
1	WAN	Enable	WAN	DHCP
2	Cellular	Enable	Cellular: SIM1, eSIM, SIM2	Auto, Auto, Auto

1. The order of rows in the Uplink Table determines failover priority — the top entry is used as the primary uplink, and lower entries are used as backups. Use the priority handle (☷) on the left of each row to drag-and-drop and reorder if needed. WAN should be on top, Cellular below it.

Figure 2 — Uplink Table on the Internet page. WAN is listed first as the primary uplink and Cellular as the backup. Use the Edit action on each row to adjust per-uplink settings.

6.3 Step 2 — Configure the WAN Uplink (Primary Link)

1. On the Internet page, click Edit in the WAN row
2. Set the IPv4 Type to match your ISP:

ISP Type	Setting
DHCP (most broadband)	Select DHCP
Static IP	Select Static, enter IP, mask, gateway, and DNS
PPPoE (fiber/DSL)	Select PPPoE, enter username and password from ISP

1. Click Save and confirm the WAN LED turns solid green
2. Verify the indicator at the top of the page shows ● Internet (green dot)

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6.4 Step 3 — Configure the Cellular Uplink (Backup)

1. On the Internet page, click Edit in the Cellular row
2. For each SIM slot you intend to use (SIM1, eSIM, SIM2), set the APN:
3. For most carriers: leave APN as Auto or enter the carrier-specific APN (e.g., vzwinternet for Verizon, fast.t-mobile.com for T-Mobile)
4. For private MVPN: enter the APN provided by your carrier account manager
5. Leave Dial number as *99# (default)
6. Click Save
7. Confirm the Cellular LED turns solid green and the Signal indicator shows at least 2 bars

Dual SIM: The Cellular uplink natively groups SIM1, eSIM, and SIM2. Use the Policy action on the Cellular row to set the order in which SIMs are tried if the active SIM loses signal.

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6.5 Step 4 — Configure Link Detection and Failover

The Uplink Setting section, located further down the Internet page, controls how the FWA02 monitors link health and how it reacts when the primary link degrades.

1. Scroll down on the Internet page to Uplink Setting
2. Toggle Link Detection to ON
3. Configure detection parameters:

Field	Recommended Value	Description
Detection Type	ICMP	Use ping for link health checks
Detection Address 1	8.8.8.8	Primary remote target for ping
Detection Address 2	1.1.1.1	Secondary target — both must fail before declaring link down

1. In the Detection Item table, enable the metrics that should trigger a failover. Recommended baseline:

Detection Item	Constraint	Value	Last Time
Latency	is greater than	200 ms	5 min
Jitter	is greater than	200 ms	5 min
Loss	is greater than	5 %	5 min
Signal Strength	is less than	Poor	5 min

1. Under the mode selector at the bottom, select Link Backup (not Load balancing)
2. Set Failover Mode to Immediately Switch so the router fails over to Cellular as soon as the WAN is declared down
3. Click Save

Figure 3 — Uplink Setting page. Link Detection is enabled, Link Backup is selected as the operating mode, and Failover Mode is set to Immediately Switch. Click Save to apply.

Result: When the wired WAN link fails or its quality crosses any of the enabled detection thresholds, the FWA02 immediately routes all traffic through the Cellular uplink. Once the WAN recovers and passes detection, traffic reverts to it automatically based on the priority order in the Uplink Table.

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7. Verification — WAN Failover Test

After completing all configuration steps, verify the failover behavior as follows:

1. Confirm normal operation: open the Dashboard and verify WAN is the active uplink and Cellular is in Standby
2. Unplug the WAN Ethernet cable from ETH 1
3. Within ~15–30 seconds, verify on the Dashboard that WAN status changes to Disconnected and Cellular becomes the Active uplink
4. From a device on the store LAN, confirm internet access is maintained (e.g., ping 8.8.8.8 or open a browser)
5. Reconnect the WAN Ethernet cable
6. After detection passes again, verify WAN returns to Active and Cellular returns to Standby

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8. Troubleshooting

8.1 Cannot Access Web UI

Symptom	Action
Browser cannot reach 192.168.1.1	Confirm PC is connected to ETH 2 (LAN) and set to DHCP or static IP in 192.168.1.0/24 subnet
Forgot web UI password	Press and hold the Reset button for 10 seconds to restore factory defaults, then use credentials on the device label

8.2 WAN Link Not Coming Up

Symptom	Action
WAN LED off	Check Ethernet cable between FWA02 ETH 1 and ISP modem/handoff
WAN LED on but no internet	Verify WAN IPv4 Type matches ISP (DHCP / Static / PPPoE)
PPPoE fails to connect	Confirm ISP username and password are correct; check with ISP for service status

8.3 Cellular Not Connecting

Symptom	Action
Cellular LED off	Confirm SIM card is inserted fully and re-seat SIM; check SIM is activated
Cellular LED blinking, no connection	Verify APN setting matches carrier; check that SIM data plan is active
Poor signal (≤1 bar)	Reposition FWA02 closer to a window or external wall; check antenna connections are fully tightened

8.4 Failover Not Triggering

Symptom	Action
WAN down but traffic not switching to Cellular	Confirm Link Detection is enabled and Link Backup mode is selected in Uplink Setting; verify the Detection Address is reachable from the Cellular path
Failover is very slow	Lower the threshold values in the Detection Item table, or reduce the Last Time observation window
Traffic not reverting to WAN after recovery	Confirm the WAN row is at Priority 1 in the Uplink Table; check WAN LED is solid green and the Internet indicator at the top of the page is green