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Internet Services

4G and 5G Internet

Enterprise cellular WAN — from LTE backup to dual-SIM 5G failover

When wireline can't move fast enough — or you need a diverse path that doesn't share the same conduit — California Telecom delivers managed 4G/5G with enterprise routers: the 4200 for solid LTE, and the 5400, our dual-SIM 5G flagship, purpose-built for secondary internet, SD-WAN failover, and demanding remote circuits. Instant activation, static IP options, and hands-on support.

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Flagship

5G + dual SIM

5400 router

Our go-to for secondary internet, SD-WAN failover, and demanding remote circuits — two SIMs for carrier diversity or active/standby paths.

4200 enterprise 4G LTE cellular router — 4G LTE
4200 router
Dependable LTE for backup, light sites, and budget-conscious failover.

Router platforms (4200 / 5400)

Flagship radio tier (5400)

Dual

SIM capability on 5400

0/7

NOC-backed monitoring

Managed hardware

Two router platforms — pick the right radio for the job

Both are enterprise-grade appliances (not consumer hotspots): Ethernet LAN, static or DHCP WAN addressing, external antenna ports where spec allows, and remote monitoring from our team. The 5400 is our flagship 5G dual-SIM when you need maximum throughput and two carrier paths in one box.

Flagship

5G · dual SIM

5400 router

Dual cellular modems / SIM capability for carrier diversity, higher peak speeds, and resilient failover inside a single appliance.

5400 series

5G + dual SIM

Enterprise cellular router

●5G NR with LTE fallback; dual SIM / dual cellular path in one appliance.
●Purpose-built for secondary internet, aggressive failover, and remote WAN sites.
●Carrier diversity without a second router — load-balance or hot-standby patterns.
●Ethernet integration with your SD-WAN edge or firewall; static or DHCP.
●Flagship cellular CPE when uptime expectations and headroom matter most.

Dual SIM — run two carriers, load-balance or keep a hot standby path without a second chassis.
Flagship choice for secondary internet, aggressive failover targets, and remote sites that need headroom as 5G coverage grows.

4G LTE

4200 router

Cost-effective LTE for reliable backup and moderate-bandwidth sites.

4200 series

4G LTE

Enterprise cellular router

●Industrial metal housing — built for closets, cabinets, and field enclosures.
●LTE WAN with Ethernet handoff to SD-WAN, FortiGate, or your core switch.
●Static or DHCP on the cellular path; public addressing when your design requires it.
●External antenna ports for marginal-signal sites (antenna kit per survey).
●Managed service: monitoring, lifecycle care, and escalation to engineering.

LTE performance where 5G is not required or budget drives the design.
Same integration story: WAN handoff to SD-WAN, FortiGate, or core switch.

Where teams deploy cellular WAN

SD-WAN & firewall failover

Ethernet handoff to your SD-WAN edge or firewall. When fiber or broadband blinks, cellular takes over — often before users notice.

Secondary & diverse WAN

Add a path that does not share the same trench or cableco terminal as your primary. Ideal for branches that cannot afford a hard outage.

Remote, mobile & temporary

Construction trailers, retail pop-ups, events, and field offices. Power and a view of the sky — we handle activation and static IP options.

Day-one connectivity

New site opening while you wait on fiber build? Stand up secure WAN in hours instead of a 30–90 day wireline timeline.

Key Benefits

4200 — 4G LTE router for cost-effective backup and moderate-bandwidth sites

5400 — 5G flagship with dual SIM for carrier diversity in one appliance

Ethernet WAN handoff to SD-WAN, FortiGate, or core switch — not a USB dongle

Static IP or DHCP; public addressing for VPN and voice where required

External antenna options for marginal-signal installs (site-dependent)

Secondary WAN, automatic failover, and remote / pop-up connectivity patterns

Managed stack: monitoring, firmware care, and escalation to our engineers

No trenching, no permits — typically online same day once hardware is on-site

Why dual SIM on the 5400 matters

A single carrier can still have a bad day — backhaul congestion, maintenance windows, or routing issues that have nothing to do with your firewall. The 5400 is built around two cellular paths in one chassis: you can diversify across two carriers, keep a standby SIM ready, or align with your SD-WAN policy for active/standby behavior. That makes it our default recommendation when the business case is mission-critical failover, secondary internet, or a remote circuit that has to stay up without sending someone on-site to swap a SIM.

4200 vs. 5400 — how we steer the design

The 4200 is the right tool when you need dependable 4G LTE at a lower hardware tier — think branch backup, kiosk-style bandwidth, or a temporary office that does not need 5G headroom yet. The 5400 steps in when you want 5G throughput, dual-SIM flexibility, and the extra margin for growth. During scoping we review signal, data plan economics, rack space, antenna strategy, and how the link will hang off your SD-WAN or firewall so you are not over- or under-built.

Internet in minutes, not months

Traditional wireline installs routinely stretch 30–90 days. Cellular WAN is different: power the router, attach antennas if needed, and bring the link up with provisioning that often completes in minutes to hours depending on carrier activation. That makes cellular ideal as a day-one connection while fiber is under construction, or as the permanent answer where copper or fiber simply is not economical.

More than a hotspot — a real WAN edge

Consumer hotspots are not designed to sit behind your security stack. Our managed appliances provide Ethernet LAN, static or DHCP WAN behavior toward your edge device, and enterprise-grade reliability expectations. They are positioned as a WAN interface on par with any other circuit — integrated with SD-WAN path selection, firewall policies, and monitoring from our operations team.

Failover and path diversity

Paired with fiber or broadband, cellular gives you path diversity that does not share the same trench, pole, or cable headend as your primary. On SD-WAN, we can prioritize voice and SaaS during brownouts and fail the entire site to LTE or 5G when hard-down conditions hit. Many customers standardize on wired plus 5400 at hub sites and 4200 or 5400 at smaller branches depending on throughput targets.

Where teams deploy it

Retail and hospitality pop-ups, construction trailers, healthcare clinics awaiting wireline, finance branches that need a diverse backup, logistics yards, event venues, and work-from-anywhere executive home offices with a business-grade SLA mindset. If you can get power and a reasonable RF environment, we can usually make it work — starting with a quick signal and mounting plan.

Frequently Asked Questions

What speeds can we expect on 4G vs 5G?

Real throughput is always a function of tower distance, band support, antenna quality, and carrier load. Broadly, LTE often lands in the tens of Mbps range for business use, while 5G can unlock 100 Mbps+ and sometimes far more when mid-band coverage is strong. We perform a site assessment and, when needed, spec external antennas so expectations match reality before you commit.

Is there a data cap?

Carrier plans vary from pooled / prioritized data to effectively unlimited business tiers. We align the data plan depth with how you will use the link — backup-only vs active secondary vs primary — so you are not paying for an unlimited profile on a router that only dribbles keepalives.

Can cellular be our primary internet?

Yes, especially where wireline is unavailable or unacceptable on timeline. Many clients run LTE or 5G as the sole WAN at remote or temporary sites. For headquarters-class traffic, we more often position cellular as secondary or tertiary alongside fiber or fixed wireless — but the architecture is always matched to your risk tolerance and application mix.

What is the difference between the 4200 and 5400 routers?

The 4200 is our 4G LTE platform — excellent value for backup and lighter throughput. The 5400 is our 5G platform with dual SIM capability for carrier diversity and higher peak performance — our flagship for aggressive failover, secondary internet, and remote circuits where you want maximum headroom in one box.

Your Next Three Steps

Reach Out

Whether it's slow infrastructure or critical downtime, we're here to listen.

We Craft a Solution

After understanding your specific challenges, we provide a customized quote, often the same day.

Get Back to Business

With our solution in place, you can focus on what really matters: growing your business.

Start Here — Talk to Us

Trusted by Businesses Across California

"We really appreciate the professionalism and clear communication California Telecom brings as our managed service provider across network infrastructure, SecOps, and the rest of the backend."

Joe Fancher

Jack Nadel Inc.

"California Telecom customer service is a shining example of what every service provider should offer. Our IT Production Services division is fully dependent on the internet. We've been a California Telecom customer for at least 7 years, and I'm amazed with the support team and level of service."

Oscar Navarro

Sony Pictures

"Long-time customer of California Telecom here, and I can say from experience that these guys are the definition of responsive. I can call or email and within minutes, have a Tier 2 engineer on the line troubleshooting the issue."

Danny Rodriguez

Lanair Group

"California Telecom has demonstrated commitment over the years, providing excellent 24/7 support and services with their T1's, VoIP service, and co-location service. They are as much a part of our business as our customers are."

Hanns Schweis

Thermal Dynamics

"We use California Telecom hosted voice and internet. Very happy since we migrated from traditional carriers like Time Warner and AT&T. Always pass on the referrals if anyone is asking for an ISP."

Vitaliy Sklyar

Netpower

"Service has always been prompt and professional, and I am yet to have any downtime. Much better than Charter and AT&T, who I suffered with for years prior."

Atilla Banoczy

Lanair Group

"We really appreciate the professionalism and clear communication California Telecom brings as our managed service provider across network infrastructure, SecOps, and the rest of the backend."

Joe Fancher

Jack Nadel Inc.

Oscar Navarro

Sony Pictures

Danny Rodriguez

Lanair Group

Hanns Schweis

Thermal Dynamics

"We use California Telecom hosted voice and internet. Very happy since we migrated from traditional carriers like Time Warner and AT&T. Always pass on the referrals if anyone is asking for an ISP."

Vitaliy Sklyar

Netpower

"Service has always been prompt and professional, and I am yet to have any downtime. Much better than Charter and AT&T, who I suffered with for years prior."

Atilla Banoczy

Lanair Group

4G and 5G Internet serving businesses across Southern California: Los Angeles · Orange County · Inland Empire · San Bernardino County · Riverside County · San Diego County · Ventura County · Nationwide