Positioning where you need it
8A models combine cellular connectivity with GPS / BeiDou. Choose 8V for applications that do not require integrated positioning.
CAIMOREVehicle Connectivity / CM520-8VX / 8AX
CM520-8VX / 8AXVehicle cellular Wi-Fi router
Cellular routing and Wi-Fi connectivity for vehicle integration. The series includes positioning and cellular module options; select the exact configuration for your project.
- Cellular
- 4G / Cat 1 / 5G variants
- Local connectivity
- Wi-Fi + RS232
- Positioning
- GPS / BeiDou on 8A
- Operating temperature
- −35 to +75 °C
8A includes GPS / BeiDou; 8V focuses on cellular and Wi-Fi connectivity.
Product photography. Open full image ↗
Built for onboard connectivity
Automatic connection recovery
Online detection, automatic redial and watchdog monitoring support unattended installations. Wired and cellular backup functions depend on the configured firmware.
Practical field diagnostics
SYSLOG, serial debug output and SNMP alarm traps help engineers investigate field issues. The graphical configuration tool includes batch-configuration functions.
Full technical specifications
Interfaces, cellular modules, hardware, power and operating conditions. Options vary by model and firmware.
External interfaces
| Parameter | Specification |
|---|---|
| Serial interface | 1 x RS232. Data bits: 7/8; stop bits: 1/2; parity: none/odd/even/SPACE/MARK; 110-230400 bit/s; no, RTS/CTS hardware or XON/XOFF software flow control. |
| WAN | 1 x WAN (LAN0), supporting PPPoE. Interface table lists 1 WAN + 4 LAN; the official page feature text also states 2 Ethernet ports. Confirm the ordered hardware layout. |
| LAN | 4 x 10/100 Mbps Base-T LAN ports, LAN1-LAN4; Ethernet IEEE 802-3 / 802-2 as printed; 1.5 kV isolation. Interface table lists 1 WAN + 4 LAN; the official page feature text also states 2 Ethernet ports. Confirm the ordered hardware layout. |
| GPS antenna | Standard SMA female, 50 ohm. GPS/BeiDou is listed for 8A variants, not 8V variants. |
| Indicators | POWER, ACT (communication) and Online. |
| Cellular antenna | Standard SMA female, 50 ohm; optional 3/5/10/15 m extension cables. |
| UIM | 1.8/3/5 V push-type card interface with 15 kV ESD protection. |
| Power connector | Standard three-pin locomotive-style power socket. |
| Wi-Fi antenna | Standard SMA female, 50 ohm; optional 3/5/10/15 m extension leads. |
| RESET | Reset button for restoring factory defaults. |
| TF cards | Two TF slots; stated support 1-32 GB. Whether the capacity is per slot confirmation required. |
| USB | 1 x USB 2.0 host port; rate 12 Mbps. This is not a claim of 480 Mbps operation. |
5G module specifications
| Parameter | Specification |
|---|---|
| Module | Industrial-grade wireless module. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| 5G NR bands | n1/n2/n3/n5/n7/n8/n20/n28/n41/n66/n71/n77/n78/n79 Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| LTE bands listed with 5G module | b1/b2/b3/b4/b5/b7/b8/b12/b13/b14/b17/b20/b25/b26/b28/b29/b30/b38/b39/b40/b41/b42/b43/b46/b48 Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Theoretical peak rates (DL / UL) | 5G NR: 3.4 Gbps / 350 Mbps; LTE Cat 20: 2.0 Gbps / 150 Mbps; HSPA+: 42 Mbps / 5.76 Mbps. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. PDF lists LTE Cat 20 at 2.0 Gbps DL; webpage shows malformed “2.0bps”. Confirm module data. |
| Transmit power | <24 dBm Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Receiver sensitivity | <-97 dBm Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Source-listed module functions | Data, voice, SMS and fax. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
4G module specifications
| Parameter | Specification |
|---|---|
| Module | Industrial-grade 4G wireless module. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Bands as listed | LTE TDD: bands 38/39/40/41; LTE FDD: bands 1/2/3/4/5/7/13/17/25; TD-SCDMA: bands 34/39; GSM: bands 2/3/8; UMTS: bands 1/5. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Coding / radio schemes | LTE/UMTS/HSPA+/DC-HSPA+/HSDPA/HSUPA/WCDMA/EDGE/GSM Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Source-listed theoretical rates | LTE TDD: DL 61 Mbps / UL 18 Mbps; LTE FDD: DL 100 Mbps / UL 50 Mbps; DC-HSPA+: DL 42 Mbps / UL 5.76 Mbps. HSPA+: DL 28 Mb/s (Category 18); HSDPA: DL 14.4 Mb/s (Category 8); HSUPA+: DL 42 Mbps / UL 5.76 Mbps (as written; confirmation required). WCDMA CS: DL 64 kbps / UL 64 kbps; WCDMA PS: DL 384 kbps / UL 384 kbps; EDGE: DL 237 kbps / UL 118 kbps; GSM: DL 171 kbps / UL 171 kbps. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Transmit power | LTE: 23 dBm; WCDMA/HSDPA: 24 dBm. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Receiver sensitivity | <-109 dBm Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
| Source-listed module functions | Data, voice, SMS and fax. Radio-module capability; exact regional modem and carrier compatibility must be confirmed. Module rates are not Ethernet throughput. |
Hardware system
| Parameter | Specification |
|---|---|
| CPU | Industrial embedded CPU, 533 MHz. |
| MMU | CPU memory-management unit, described as preventing overflow-related system exceptions. |
| Flash | 128 Mbit; expandable to 256 Mbit. Original unit retained: Mbit, not MB. |
| SDRAM | 1 Gbit. Original unit retained: Gbit, not GB. |
Power
| Parameter | Specification |
|---|---|
| DC input | 5-35 V DC; reverse-polarity, overvoltage and overcurrent protection. Supplied PDF states 5–35 V DC; the official webpage voltage string is malformed. Do not use this value for wiring until the ordered revision is confirmed. |
| Standard supply | 9 V DC / 1.5 A |
| Communication current | Average: 390 mA at +9 V DC; peak during network registration: 1.0 A at +9 V DC. Values from supplied PDF; webpage units are malformed. Network, load and test conditions require confirmation; these are not automotive power-validation results. |
| Standby current | Average <56 mA at +9 V DC. Values from supplied PDF; webpage units are malformed. Network, load and test conditions require confirmation; these are not automotive power-validation results. |
Mechanical and environmental
| Parameter | Specification |
|---|---|
| Enclosure | Metal; electromagnetic shielding, interference resistance, isolated enclosure/system and lightning-protection design. IP30 is stated here, conflicting with IP41 in the reliability section. IP41 and IP30 conflict. Neither rating is confirmed for procurement. |
| Body dimensions | 168 x 104 x 26 mm; excludes antennas and mounting hardware. Dimension table states 168 × 104 × 26 mm; drawing includes 169 × 105 mm. Confirm the mechanical revision. |
| Package dimensions | 350 x 215 x 88 mm |
| Weight | 0.7 kg |
| Operating temperature | -35 to +75 °C |
| Extended operating temperature | -40 to +80 °C |
| Storage temperature | -40 to +85 °C |
| Relative humidity | 95%, non-condensing. |
Software, networking & recovery
| Parameter | Specification |
|---|---|
| VPN | PPTP + L2TP + MPPE; IPsec + GRE. Protocol availability depends on firmware; suitability for project security policy must be reviewed. |
| Routing and IP services | Static and dynamic routing; PPPoE; PPP server/client; DHCP server/client; DDNS; NAT (SNAT/DNAT), DMZ and IPTABLE firewall. |
| Private network access | APN / VPDN; requires operator services and the ordered modem configuration. |
| Link recovery | Online detection, automatic redial, and wired/cellular link backup are listed. No recovery time or uninterrupted-service guarantee. |
| Watchdog and reset | Software protection, CPU WDT and VWM monitoring; source describes a full reset following a network or interference exception. |
| Traffic and scheduling | QoS; scheduled connection/disconnection and scheduled power switching. |
| Configuration | Local/remote web configuration; graphical tool with batch configuration listed. This does not establish a complete fleet-management service. |
| Monitoring and diagnostics | SYSLOG; selectable serial debug output; SNMP management and alarm traps. |
| Firmware maintenance | Local firmware upgrades and remote TFTP software upgrades listed; confirm current approved firmware and update procedure. |
| Listed network protocols | TCP/IP, UDP, ICMP, SMTP, HTTP, POP3, OICQ, Telnet and FTP. Legacy protocols are not a security recommendation. |
| Development environment | Linux / Windows support is mentioned without clarifying device OS versus management host. Python, public APIs, SDKs and examples are not confirmed. |
Certifications & deployment qualification
| Parameter | Specification |
|---|---|
| Automotive certification | No certificate annex establishing coverage of these exact variants has been reviewed. General CM520 or module-level certificates do not establish 8VX/8AX vehicle approval. |
| Electrical and transient tests | Source lists a 3000 V electrical test and protective circuitry. Automotive transient compliance, test standard, conditions and results remain unconfirmed. |
| Regional ordering configuration | Confirm modem part number, country bands, SIM/modem count, carrier acceptance, antennas and final order code. No region-specific order codes or package contents are confirmed. |
Choose your model
8V: cellular and Wi-Fi. 8A: cellular, Wi-Fi and GPS / BeiDou.
| Model | Cellular | GPS / BeiDou | Wi-Fi / buffering |
|---|---|---|---|
| CM520-8VF | 4G | Not included | Supported |
| CM520-8VT | LTE Cat 1 | Not included | Supported |
| CM520-8VFS | 5G | Not included | Supported |
| CM520-8AF | 4G | Supported | Supported |
| CM520-8AT | LTE Cat 1 | Supported | Supported |
| CM520-8AFS | 5G | Supported | Supported |
Regional bands and final configuration are confirmed with your quotation.
System connectivity
From field equipment to your system.
See how CM520-8VX / 8AX fits into your installation.
Illustrative connection architecture. External equipment and customer software are shown for context. Interfaces and options vary by configuration.
Typical integration scenarios
Illustrative system requirements, not claims of customer deployments or a complete vehicle platform.
Public transportation
Connect onboard devices through cellular routing and local Wi-Fi.
Select the interface and radio configuration for your onboard network.
Fleet telemetry
Transport equipment data to your telemetry platform.
8A variants add GPS / BeiDou for positioning-related integration.
Vehicle surveillance
Provide a network uplink for onboard cameras or an NVR.
Size the connection for your video bitrate and carrier data plan.
Downloads
CM520-8A / 8V — Vehicle Wi-Fi router family
Product sheet · PDF · 0.4 MB
Source revision: not stated · Technical review edition
Evaluation questions
Before you choose.
Does every variant include positioning?
No. The official selection guide lists positioning for 8A variants and not for 8V variants. Confirm the ordered module and antenna configuration.
Is this series automotive certified?
Confirmation required. Automotive certification and vehicle transient protection must be established with model-specific documentation before procurement.
Request a quote / CM520-8VX / 8AX
Tell us what you are building.
Share your interface, deployment and volume requirements so the exact configuration can be reviewed.