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Poly VBP (Video Border Proxy) 4555

This is an end of life product – Please contact our sales team for the up to date models.


The Poly Video Border Proxy (VBP™) 4350 network appliance allows your organization to conduct video conferences clearly and securely by resolving the challenges caused by firewalls

Users of standards-based video endpoints, such as the high definition Poly HDX 4000™ and Poly HDX 7000™ series, can now remotely and securely communicate over video on the enterprise network.

By performing video NAT at the IP address boundary, the VBP 4350 network appliance eliminates the risks of tunneling video and voice traffic from the network perimeter. With both an Ethernet WAN port and a software-selectable integrated T1 CSU/DSU interface, the VBP 4350 appliance can be utilized as a WAN access router or installed behind an existing WAN access router. The VBP 4350W model also includes 802.11 (b & g) wireless connectivity with other network devices.

The VBP 4350 appliance employs a stateful packet inspection firewall, in combination with an application layer gateway, which determines when to open or close TCP and UDP ports for video and voice endpoints. To maximize video and voice quality, the VBP 4350 appliance forwards video traffic via the shortest possible path, effectively minimizing jitter, delay, and packet loss.

Bandwidth unused by video or voice is made available to boost WAN bandwidth and enable data traffic to burst at full line rate. To ensure control over video and voice quality, the VBP 4350 appliance also possesses traffic management capabilities such prioritization, traffic shaping, call entry control, and diffserv marking/policing.

Make Great Things Happen with the Poly VBP 4350 Series Converged Network Appliance In today’s Internet driven world, the ability to conduct real time communication and collaboration has become critical to an organization’s survival. As the market leader in voice, video and content collaboration and communications, our award-winning conference technology makes it easy for people to interact and maximize productivity – over any network, in just about any environment, anywhere around the globe. That’s why more organizations worldwide use and prefer Poly conferencing solutions. Because when people work together, great things happen. See how you too, can achieve great things with the Poly VBP 4350 series converged network appliance.


  • Seamless resolution to challenges of communicating through firewalls
  • Application layer gateway for H.323 video, SIP, and MGCP voice
  • Dynamic access control list for simplified set-up and operation
  • Video and voice media routing via shortest possible path
  • Call entry control to prevent congestion of prioritized traffic
  • Traffic management capabilities including priority queuing, traffic shaping, and diffserv marking/policing
  • Support for up to 3 Mbps of voice, video, or data traffic in any combination
  • All-in-one network traversal solution for voice, video, and data networks
  • Both T1 (4350 only) and Ethernet WAN access router
  • Integrated four-port managed Ethernet switch with VLAN support
  • Embedded LAN side gatekeeper supporting up to 15 registrants

WAN Interfaces

T1 (not available on VBP 4350W model)
Framing: ESF
Line coding: B8ZS
Line build out: 0,-7.5,-15dB
T1 is not available in all countries. Consult the Poly price List for country availability.

10/100 Mbps
Auto-sensing, full or half duplex

WAN Protocols
Frame relay

LAN Interfaces
4 x 10/100 Mbps Ethernet ports
Auto-sensing, full or half duplex
Managed switch supports VLAN 802.1Q tagging and
forwarding for up to 16 unique VLAN Ids

Wireless (VBP 4350W only)
802.11 (b & g)


Height 1.7”, Width 10”, Depth 7”
Weight: 2 lbs.

External power brick: 12V, 3.0A

FCC Part 15 (Class B) and Part 68, UL, cUL, CE, Industry Canada ICES-003 and IC-CS03

Syslog support
Software Features

Video and Voice
SIP, MGCP and H.323 application layer gateway enables a single public IP address to be used for multiple endpoints
Shortest path routing for media optimizes video and voice quality
Embedded LAN side gatekeeper supporting up to 15 registrants

Class based queuing/prioritization
Diffserv marking and policing
Traffic shaping
Video and voice call admission control prevents oversubscription of priority queue

Stateful packet inspection firewall
Application layer gateway dynamically provisions and
closes UDP ports used for video and voice calls
IPSec: 3DES, SHA-1
NAT/PAT server hides enterprise LAN topology

Passive Call Quality Monitoring (voice only)
Per call statistics include mean opinion score (average and minimum), jitter, latency, packet loss and much more
Alarms for poor MOS scores
Active call count indicators

VBP 4350-E3 NAT/ firewall traversal unit includes a
four-port 10/100 Ethernet switch, integrated T1 CSU/DSU WAN interface, or 1x 10/100 Ethernet WAN interface with capacity of 3 Mbps of traffic.
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