NOTE: Exclusion from this list means only that compatibility has not been verified, it does not mean incompatibility.
On-Premise
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
* Note: For vendor specific detailed configuration instructions, see Configuring Viking VoIP Phone and SIP
Servers, DOD 944.
** Note: Relay operation commands are Not compatible with Panasonic Phone Systems (Panasonic does not
transmit DTMF between station ports).
Viking VoIP SIP System Compatibility List
Cloud Based Service Provider
Callcentric*
iptel.org
MetaSwitch
Ring Central
sip.antisip.com
Switchvox
unify
Vertical Wave*
Voice Carrier
VoIP.MS*
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