Note: We highly recommend consulting an IT or network professional when configuring advanced network settings or devices.
General Configuration
Disable all of the following
- SIP ALG (Application Layer Gateway) functions such as SIP Transformations, SIP Application Helpers, SIP Normalization, etc.
- SPI (Stateful Packet Inspection)
- AV Client Enforcement on any IP assigned to a phone
- Content Filtering on any IP assigned to a phone
Enable all of the following
- Bandwidth Management/Traffic Shaping (See below for a list of our network blocks and bandwidth requirements)
- Default UDP session timeout to 300 seconds
- Consistent NAT (Sonicwall)
- Load balancing policy configured for ingress and egress of phones on same WAN interface only. (If applicable)
- Inbound and outbound traffic on ports and subnets listed below
- DNS resolution for the phones
Subnet and Port Configuration
SpectrumVoIP Public Subnets
- 199.71.209.0/24
- 24.227.249.0/25
- 72.249.136.32/28
- 206.123.122.32/27
- 212.69.157.32/27
- 40.143.31.64/27
Ports - Stratus Platform
- 5060-5062 UDP - SIP
- 20,000-40,000 UDP - RTP
- 80, 443 TCP - HTTP/HTTPS
Ports - Enswitch 1 and 2 Platforms
- 5060-5062 UDP - SIP
- 10,000-20,000 UDP - RTP
- 80, 443 TCP - HTTP/HTTPS
Bandwidth Requirements
Voice only applications utilize G.711 U-Law as the primary codec and require 87.2Kbps of bandwidth per active call. We've found a good rule of thumb is to round the requirement up to 100Kbps to account for signaling and overhead.
Example:
A 10Mbps/1Mbps ISP connection that is solely dedicated to the phones would support 10 concurrent phone calls.
We highly recommend that Bandwidth Management/Traffic Shaping policies prioritizing VoIP traffic are configured and tested on your router/firewall.