Cudy LT300: Backup 4G LTE Internet for Office — Review

Why Backup Internet

Without internet: POS dies, online cashier dies, delivery stops, kitchen tablets miss orders, cloud surveillance fails. Uzbekistan ISPs drop 1-2x/month for 30-90 min. 4G LTE backup auto-takes-over in 5-10 sec.

Cudy LT300

LTE Cat 4 (150/50 Mbps), Wi-Fi 4 N300, 1× WAN/LAN + 1× LAN, microSIM, 12V.

Real Tashkent Speeds

30-50 Mbps in Tashkent enough for: 5-10 voice calls, POS, online cashier, 2-3 work stations, 1 cloud camera. Regions 5-15 Mbps — basic only.

SIM Choice

• Unlimited tariff mandatory
• Business plans (Beeline Business) priority at peak
• ~250-400k UZS/month
• No tourist 5GB cards

Failover Setup

Main router with dual-WAN (UCG-Ultra, MikroTik hAP ax², some TP-Link):

1. Main internet → WAN1
2. Cudy LT300 → ethernet → WAN2
3. Enable dual-WAN failover

UniFi: Settings → Internet → Edit WAN1, Add WAN2 (Failover only), health check ping 8.8.8.8 every 5 sec.

Other Uses

• Primary at remote sites (construction, country house, temp office)
• Home office backup
• Isolated IoT network

Our Test

1 month as primary during ethernet renovation:

• 99.5% uptime Tashkent
• 8 workstations OK
• Zoom flawless
• Netflix 4K no, 1080p OK

After install became backup — auto-engaged 4 times in 6 months, ~25 min each. Saved dozens of transactions.

Pitfalls

1. Antennas — internal OK in Tashkent, external 200-300k for regions
2. Placement — by window
3. "Unlimited" cap — fair use 100-200 GB then throttled
4. Not for fast main channel
5. Wi-Fi 4 outdated — use as modem behind real Wi-Fi router

Alternatives

• Cudy LT400 — Wi-Fi 5, LTE Cat 6 (300 Mbps), 1.5× price
• MikroTik LtAP mini — RouterOS, ~1.5-2M
• Yota/Beeline 4G modem — cheapest (~600k), no failover

Office Solution

10-30 person office:

• Main: UCG-Ultra or MikroTik hAP ax²
• Backup: Cudy LT300 + Beeline Business unlimited
• LT300 by window
• 1.2M + 1.5-1.8M + 250k/month

Pays for itself on first outage.

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