Product Details


  • 4G/LTE Dual-SIM Dual-Band Wireless VoIP VPN Router
The BiPAC 4520VAOZ supports the latest generation of 4G/LTE fixed wireless network which is reliable, scalable and flexible for various indoor applications. Embedded with 4G/LTE module and Gigabit EWAN interfaces, the BiPAC 4520VAOZ enables high-speed and secured internet connectivity for home, SOHO, and corporate users. With an integrated dual-band wireless access point and 4-port Gigabit Ethernet LAN, the BiPAC 4520VAOZ can run both 2.4GHz and 5GHz to maximum wireless speed 1.2Gbps (867Mbps at 5GHz, 300Mbps at 2.4GHz) and 10 times faster LAN connection than the regular 10/100mbps Ethernet LAN. Meanwhile, the device integrates with two FXS ports allowing simultaneous VoIP calls, and users can choose the most economical rate of VoIP calls provided by different providers.
  • Key Features & Benefits
  • Features & Specifications
  • Application Diagram

Ideal for SOHO, office, and home users 


VoIP Supplemental Services High Performance 

  • Hot-line/ Warm-line, Call Forwarding, Call Transfer, Call Waiting, 3-way Conference Call, etc.


High Performance 

  • High speed LTE module *1
  • Gigabit Ethernet WAN and LAN
  • Dual-Band wireless reaches 2.3Gbps


High Availability 

  • Fully supports for multiple LTE frequency bands *1
  • Dual-WAN interfaces - LTE and Gigabit EWAN 
  • Single Radio/ Dual SIMs
  • Dual-Band wireless - 2.4GHz and 5GHz
  • Multiple wireless SSIDs with wireless client isolation


Secure VPN Connections 

  • Embedded IPSec, GRE, OpenVPN, PPTP, L2TP with powerful encryption


IPv6 Support 

  • IPv4, IPv6, IPv4/ IPv6 dual stack *2


USB Storage/ NAS 

  • Embedded SAMBA server, FTP server

Features & Specifications


  • Compliant with SIP standard (RFC3261)
  • Codec: G.729, G.726, G.711 A-Law, G.711 u-Law
  • DTMF method: Inband, RFC 2833, SIP Info
  • T.38 Fax relay
  • Caller ID generation: DTMF, FSK
  • Silence Suppression (VAD), Echo Cancellation
  • Hot-line/ Warm-line
  • Call Forwarding, Call Transfer
  • Call Waiting, 3-way Conference Call
  • Anonymous Call, Block Anonymous Call
  • Speed Dial, Return Call, Redial
  • Dial Plan
  • Don't Disturb Function
  • VoIP NAT Traversal


High-speed Mobile Wireless Communication 

  • Embedded high performance 4G LTE module*1
  • High performance external antenna


Embedded 4G LTE

  • Frequency bands and data rare depend on equipped  4G LTE module*1


Network Protocols and Features 

  • Dual WAN Failover/ Failback
  • IPv4, IPv6, IPv4/IPv6 dual stack*2
  • Dual APN*2
  • Keep Alive
  • IP Pass-Through
  • NAT, Virtual Server and DMZ
  • Static Routing, Dynamic Routing (RIP v1/v2, OSPF, BGP)
  • SNTP, DNS relay and DDNS
  • Universal Plug and Play (UPnP) compliant
  • Supports DHCP server/ client/ relay



  • Built-in NAT Firewall
  • Stateful Packet Inspection (SPI)
  • Prevents DOS attacks, including Land Attack, Ping of Death, etc.
  • Access Control
  • IP Filtering, MAC Filtering, URL Filtering
  • VPN pass-through


Virtual Private Network 

  • IPSec
  • PPTP
  • L2TP
  • GRE
  • OpenVPN


Wireless LAN 

  • IEEE 802.11a/b/g/n/ac compliant
  • Concurrent dual-band 802.11a/n/ac(5GHz) and 802.11b/g/n(2.4GHz)
  • Up to 1733Mbps wireless operation rate at 5GHz
  • Up to 600Mbps wireless operation rate at 2.4GHz
  • Wi-Fi security with WEP 64/128, WPA-PSK, WPA2-PSK, Mixed WPA/WPA2-PSK
  • WPS (Wi-Fi Protected Setup) for easy setup
  • Multiple SSIDs
  • Wireless MAC Filtering
  • Wi-Fi Client Isolation
  • Wi-Fi Hotspot with Captive Portal
  • Support RADIUS authentication
  • Wi-Fi client rate-limiting


USB Applications Server 

  • Storage/NAS: FTP server, SAMBA server



  • Password protection for system management
  • Quick installation wizard
  • Web-based GUI for remote and local management
  • Firmware upgrades and configuration data upload and download via Web-based GUI
  • TR-069 (CWMP)*2, SNMP
  • 4G LTE Usage Allowance
  • Syslog monitoring
  • Physical layer/protocol diagnostic test tool
  • Scheduling Auto-Reboot
  • Billion CMS


Hardware Specifications 

Physical Interface 

  • Two (2) detachable high performance 4G LTE antennas
  • Two (2) detachable 5GHz & 2.4GHz antennas
  • Two (2) internal 5GHz & 2.4GHz antennas
  • Four (4) Gigabit Ethernet auto-crossover (MDI/MDI-X) switch
  • One (1) USB 2.0 host type A
  • Two (2) FXS Telephone ports
  • Two (2) 2FF mini-SIM slot (BiPAC 4520VAOZ R3)
  • Factory default reset button
  • Wireless on/off and WPS push button
  • Power jack for DC input



  1. The 4G LTE is dependent on your local service provider. 
  2. Only upon request for Telco/ ISP tender projects.
  3. Specifications in this datasheet are subject to change without prior notice.
WAN Interface
Hardware Interface
SIM slot ● (x2)
Gigabit Ethernet ● (x4) Configurable EWAN x1
802.11n (2.4GHz) 600 Mbps(3x3)
802.11ac (5GHz) 1733 Mbps(4x4)
USB Host ●(USB 2.0)
Dual APN
Dual WAN (Failover/Failback)
Dual WAN (Load Balance)
Interface Grouping
IPv4 / IPv6
Hardware Specifications
Physical Specifications 9.04" x 6.10" x 1.69" (229.5 mm x 155 mm x 43mm)
Power Requirements DC power input: 15V DC, 2.0A
Storage temperature 0°C ~ 40 °C
Humidity 20﹪~ 95﹪non-condensing