IMPORTANT: Exclusion from this list means only that compatibility has not been verified, it does not mean incompatibility.

On-Premise VoIP SIP Systems

3COM VCX
3CX
Allworx*
Aastra
Asterisk
Atcom
Avaya Aura Platform
Avaya IP Office Platform
BlueBox
Brekeke
Cisco Unified Communications Manager (CUCM)*
Cisco Unified Communications Manager Express
(CUCME)
Elastix
epygi QX200*
Freeswitch
Grandstream*
Interactive Intelligence
iPECS (Ericsson-LG)*
Iwatsu ECS*
Kamailio
Mitel 3300
NEC
OfficeSIP
OpenSIPS
Panasonic** (with SIP Extension Card)
PolyCom (SIP paging only)
Samsung Communications Manager (SCM)
ShoreTel*
Siemens Communications Server (SCS)
SIP Express Router (SER)
Snom PBX
Sonus
Switchvox
Teksip
Toshiba
Vertical Wave*
Yealink T Series S IP Phones

Cloud Based VoIP Service Providers

Callcentric*
iptel.org
MetaSwitch
Ring Central
sip.antisip.com
Switchvox
unify
Vertical Wave*
Voice Carrier
VoIP.MS*

* Note: Download this page as a PDF for additional configuration information regarding your specific SIP system.

** Note: Relay operation commands are NOT compatible with Panasonic Phone Systems (Panasonic does not transmit DTMF between station ports).

For detailed configuration instructions, contact Viking at: 715-386-8861