Vertiv ACS804MEAC-400 4-Port Serial Console Server with Analog Modem
Overview
The Vertiv ACS804MEAC-400 is a 4-port serial console server from the ACS 800 family, built for out-of-band management of network and data center equipment. It ships with both AC and DC power input support and an integrated analog modem — giving remote operations teams a fallback management path when primary IP connectivity is unavailable. The ACS804MEAC-400 (often searched as ACS804MEAC 400) runs on an ARM processor, a common choice in always-on embedded management appliances where low power draw and long-term stability matter more than peak compute throughput.
Twisted pair media support means the unit connects to standard RJ-45 serial infrastructure — no specialty cabling required for most data center or network closet installations. If you're managing network switches, routers, or other serial-console-equipped devices and need a compact, dual-power out-of-band solution with modem fallback, this is worth evaluating against your site requirements.
Key Features
- 4 Serial Ports: Four console ports handle four independently managed devices — appropriate for smaller equipment rooms, branch offices, or edge deployments where a full 8- or 16-port unit would be over-provisioned.
- Integrated Analog Modem: When your primary network path is down, the analog modem provides a dial-in fallback for emergency access — a meaningful insurance policy for remote or unmanned sites where dispatching a technician is costly.
- Dual AC/DC Power Input: AC/DC flexibility means the same unit can deploy in both standard office or data center environments (AC) and telecom or industrial enclosures running 48V DC plant power — without requiring a separate power conversion chassis.
- ARM Processor: ARM-based architecture keeps power consumption low for an always-on appliance. Console servers run continuously and an energy-efficient processor reduces thermal load inside cabinets with limited airflow.
- Twisted Pair Media: Standard twisted pair connectivity integrates with existing structured cabling infrastructure — no adapters, no specialty serial media required for baseline deployment.
What's in the Box
- 1x ACS 800 Serial Console Server unit
- 1x AC/DC Power Supply
- 1x PDU power cable
Frequently Asked Questions
Q: What is the difference between the ACS804MEAC-400 and a standard ACS 800 unit without a modem?
A: The ACS804MEAC-400 includes an integrated analog modem, providing a dial-in out-of-band management path when primary IP network connectivity is unavailable. Units without the modem designation lack this fallback access option.
Q: Does the ACS804MEAC-400 support both AC and DC power environments?
A: Yes. The unit ships with AC/DC power supply support, making it compatible with standard AC data center environments as well as DC-powered telecom and industrial enclosures.
Q: What type of cabling does the ACS804MEAC-400 use?
A: The unit uses twisted pair media for its serial connections, which is compatible with standard structured cabling infrastructure found in most data centers and network closets.
Q: How many devices can the ACS804MEAC-400 manage simultaneously?
A: The ACS804MEAC-400 provides 4 serial console ports, allowing simultaneous out-of-band access to four separate devices. For larger deployments, consider higher-port-count variants in the ACS 800 family.
Q: What processor architecture does the ACS804MEAC-400 use?
A: The unit runs on an ARM processor, a low-power embedded architecture well-suited to always-on console server appliances.
The ACS804MEAC-400 is the model I'd reach for when a branch or remote site needs out-of-band console access to four devices and you can't assume the IP network will always be available — the integrated analog modem is what separates this from a basic 4-port console server. That dial-in fallback path is the spec that justifies the part number.
Technical Highlights:
- Analog Modem Fallback: Dial-in access when your primary network is down — essential for remote or unmanned sites where a truck roll costs more than the hardware.
- AC/DC Dual Power: Deploy in a standard AC rack or wire directly into DC plant power without a separate converter — a real advantage in telecom central offices and hardened edge enclosures.
- ARM Processor Architecture: Low-power embedded compute keeps the unit running continuously without meaningful thermal contribution inside a loaded cabinet.
Deployment Considerations:
- With only 4 ports, size your deployment accurately — if the site has more than four serial-managed devices today, or is likely to add them, a higher-port-count ACS 800 variant avoids a forklift upgrade later.
- Analog modem fallback requires an active POTS line at the site — confirm that line is provisioned and tested before relying on it as your emergency access path.
Best fit for remote edge sites, small branch equipment rooms, or telecom closets with DC power infrastructure where modem-based emergency access is a hard requirement rather than a nice-to-have.
