OPTIMIZATION GUIDE FOR ENTERPRISE NETWORKS

While Versature’s service has been engineered to work in most environments without requiring changes to firewalls or other network components, this guide contains information that may help optimize the network for Versature’s Hosted PBX service.

Protocols & Ports

The Versature service uses:

  • UDP/IP port 5060 for signaling (SIP)
  • TCP/IP port 5060 for signaling (SIP)
  • TCP/IP port 5061 for signaling (SIP-TLS)
  • TCP/IP port 9002 for signaling (WebRTC) 
  • UDP/IP ports 20000-32000 for audio streams (RTP)
  • TCP/IP port 80 (HTTP) for provisioning 
  • TCP/IP port 443 (HTTPS) for provisioning 

NOTE

TCP/IP port 5061 for signaling (SIP-TLS) and TCP/IP port 9002 for signaling (WebRTC) are for future use. 

These connections will be initiated by the phone and replied to by Versature’s soft-switch. We recommend allowing outbound connections on these ports to all hosts when possible, as it avoids having to reconfigure the network device when Versature’s infrastructure is modified. If a specific address is preferred, allow communication to host proxy-pri.versature.com, proxy-sec.versature.com, and proxy-ter.versature.com. For provisioning, and to access Versature’s online tools, access to web sites via TCP/IP ports 80 and 443 is required.

NOTE 

If your firewall or router does not allow you to input fully qualified domain names, use the IP addresses these hostnames resolve to, and add our new IP block 204.235.80.0/20. 

Bandwidth

In the default configuration, each concurrent phone call uses approximately 88 Kbps of bandwidth in each direction. When an internal extension calls another extension on the same LAN, we must account for both legs of the call, which will use twice the bandwidth. Other codecs may be configured to reduce bandwidth use; please inquire as to the options available at your site.

SIP-Aware Devices

Some devices contain a SIP ALG or application-level gateway, and this should be disabled to avoid causing signaling or audio problems with the Versature Service. Some devices refer to this simply as a checkbox for “Enable SIP,” please disable this feature.

Cisco Devices

On Cisco devices, disable the SIP helper using commands similar to the following:

  • router(config)#no ip nat service sip tcp port 5060
  • router(config)#no ip nat service sip udp port 5060

Quality of Service (QoS)/DiffServ

If your network can prioritize traffic using the industry-standard DiffServ packet markings, please prioritize packets with the marking EF (Expedited Forwarding).

Depending on the specific equipment, here are some values that may assist you:

  • EF DiffServ decimal: 184
  • EF DiffServ hexadecimal: 0xb8
  • EF DiffServ binary: 10111000 (in red: DSCP field)
  • EF DSCP decimal: 46
  • EF DSCP hexadecimal: 0x2e

Note that many third-party networks choose not to honor these markings; however, Versature’s equipment does add them to real-time packets.

Contact Us

Versature’s customer service team has experience optimizing many different network devices. Please contact us for more specific information and assistance.

For immediate assistance, you can contact our Technical Support Team by dialing 611 from your Versature device or by calling 1-877-498-3772 and choosing option #3. Emails will be responded to within one1 business day and can be sent to support@versature.com

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