Routers & Firewalls
SonicWall Reflexive NAT Policies for nexMatrix SIP Trunks
Many thanks to Matt York at Wilkes Communications/Riverstreet Networks in Wilkesboro, NC for providing this great documentation! 1:1 port 5060 Source PAT (Inside Local : Inside Global 5060:5060) This document will cover SonicOS Enhanced 6.5.x.x. ...
Actiontec DSL modem/router - Transparent Bridging mode
If you are placing a Protel PBX behind a NAT router that is connecting to the internet via a DSL connection, you will need to disable the NAT functions of the DSL modem/router. If NAT is not disabled, you will very likely not be able to register ...
Fortigate
Fortigate firewall products have SIP session helpers that are on by default. These need to be turned off! http://help.fortinet.com/fos50hlp/54/Content/FortiOS/fortigate-voip-guide-52/sessionhelper-disenable.htm Fortigate, like many firewalls, ...
Changing Network settings on a Protel PBX through CLI
You should only use this method if you are unable to log into the PBX through its web-based administration interface. For more information, read the PBX Initialization steps HERE You will need to connect a USB keyboard to one of the USB ports on ...
Local SIP port assignments for IP phones
Perhaps the most common cause of problems with IP phones is inconsistent signalling communication between the end point (phone) and the PBX. The symptoms of this include: The phone won't register to its extension account on the PBX. BLF buttons on ...
Using Wireshark
by Ben Logan Network Technician WIlkes Communications, Inc Wilkesboro, NC With voice quality issues, where you get the capture from is critical. Let's say there's a PBX at point A, switches at points B and C and the problematic phone is point D. ...