| Product | GnuGk Version | Tester | Comment |
| Aastra OpenCom 1010 | 2.3.5 | jan@willamowius.de | OK |
| Accel Elite 200 | 2.0.5 | alexandru.coseru@distinctgroup.net | OK, as endpoint and gateway |
| Accel Elite 800 / 3.23 | 2.0.2 | squall@ideaway.net | OK |
| ACCORD MGC-100 MCU / sw version 2.23 | 1.0 pre 8 | asterx@netposta.net | OK |
| ACCORD MGC-100 MCU V7.XX | 2.2.8 | | OK |
| ACME NET-NET SD (v4) | 2.2.4 | msuhail@msn.com | OK, as Routed Signaling Gatekeeper |
| Acmepacket SBC 2.0 | 2.2.2 | msuhail@msn.com | OK |
| ACT Sagitta IP Phone | 1.0 | cwhuang@linux.org.tw | OK, use firmware >=2.09 |
| AddPac VoiceFinder AP-200 / 6.067 | 2.0.5 | rrisco@millicom.net.pe | OK, supports CAT for RadAuth module |
| AddPac VoiceFinder AP-200B/D | 2.0.6 | cavagnaro@wirelessperu.com | OK |
| AddPac VoiceFinder AP-200E/AP1002 | 2.0.7 | rauleli@wizardteam.com | OK |
| AddPac AP-1100 | 2.0.6 | rich@skj-sakai.co.jp | OK |
| Aethra MaiaXC 1.5.27 | 2.3.1 | mike@bridgeconference.co.za | OK |
| Aethra Vega Star Silver 6.0.49 | 2.3.1 | mike@bridgeconference.co.za | OK |
| Aethra Vega X3 12.1.10 | 2.3.1 | mike@bridgeconference.co.za | OK |
| AG-168 one port gateway | 2.0.5 | petersun@atcom.com.cn | OK |
| AGP Telecom GD1000 gateway (SW 1.2.0) | 2.2.0 | john.demore@agptelecom.com | OK |
| AGP Telecom P10,P20,P21 (SW h.450.60-8a0) | 2.2.0 | john.demore@agptelecom.com | OK |
| aiOne323 v1.0.1 | 2.2.6 | support@aioneswitch.com | OK |
| Alcatel OmniPCX Enterprise R5.1 | 2.0.6 | jimmy@abst.com.tw | OK |
| Alcatel OmniPCX Office R.3, R.4 and R.5 | 2.0.3 | vmarco@hotmail.com | OK |
| Alcatel Softswitch (SMC 3.0) | 2.2.1 | cvenegasl@gmail.com | OK, GK-GK scenario in routed mode |
| Allied Telesyn VP504E FXO Gateway | 2.0.2 | mkruk@reu.edu.uy | OK |
| Allied Telesyn VP504E FXS | 2.0.2 | mkruk@reu.edu.uy | OK |
| Amerilat 5302 FXS | 2.0 | jpeters@tropico-network.com | OK |
| Amerilat 5504 FXO | 2.0 | jpeters@tropico-network.com | OK |
| Anka Voip phone | 2.0.3 | nwong@ankatechnologies.com | OK |
| Antek gateway EGW-904 | 0.17 | pioneer@dome.net.tw | OK |
| Antek VSP-2004 | 2.0.2 | soji@mdci.ca | OK |
| Antek VSP-2510 with 2 VM 402 | 2.2.1 | j@waytechnet.com.br | OK |
| Antek VSP-5002 | 2.2.1 | j@waytechnet.com.br | OK |
| Antek VSP-5004 | 2.2.1 | j@waytechnet.com.br | OK |
| Anyuser IP Phone | 0.17 | cwhuang@linux.org.tw | OK |
| Ascend MAX 6000, TASO 9.0-154.0 | 2.0 | fred@ebone.at | OK |
| Ascend MAX 6000 | 0.17 | wendell@sunnet.com.br | OK |
| Ascend TNT / TAOS 9.1.2 | 2.0.5 | jaime@netline.cl | OK |
| Ascend MaxTNT / TAOS 9.0 | 1.0pre6 | havemann@bell-labs.com | OK |
| Ascom APA-45o-Voice and APA-45i-Voice | 1.0 | Kaing.Szeto@ascom.ch | OK |
| Asiasoft SOX-9000 | 2.2.1 | alta1@163.net | OK |
| Asterisk 1.2.7.1 with Oh323 | 2.2.5 | Rushan@mec.com.jo | OK, see config notes |
| Asterisk since V 0.96 | 2.2.2 | sgaleotti@grupoalternativa.com | OK |
| Asterisk PBX / CVS version April 2003 | 2.0.3 | biba200@yahoo.com | OK |
| AT-323 ip phone | 2.0.5 | petersun@atcom.com.cn | OK |
| Audiocodes gateway MP-10x | 2.0 | m.bruni@mail.anywarenet.it | OK |
| Audiocodes Mediant2000 | 2.0.2 | nickfrat@packetback.com | OK |
| Auvtech VoIP Gateway 1.1 | 2.0.2 | hongbo@auvtech.com | OK |
| Auvtech VoIP Softswitch 1.2 | 2.0.2 | hongbo@auvtech.com | OK |
| Avaya 4610SW | 2.2.3 | agr.telecom@gmail.com | Failed, 4610 sends malformed GRQ, reboots on GCF |
| Avaya Communication Manager 6.0 | 3.0.2 | | OK, use H.323 trunk without registering with Avaya |
| Avaya IP Office 4.0(10) | 2.2.6 | tj.adams@cabletecbns.com | OK |
| Avaya MCU / Version: 7.1.26 | 2.0.3 | benroy@washington.edu | OK, works only in routed mode |
| BATM Access 201 | 2.2.0 | teodor@egvrn.net | OK, problems with GRQ and NAT |
| BCM HP-180 | 2.0.5 | jphn@mpn.com.tw | OK |
| BCM KG1000-LS-HX | 2.0.2 | gary@mpn.com.tw | OK |
| BCM KG1000-L2S-HX | 2.0.2 | gary@mpn.com.tw | OK |
| Boscom Bosanova USB Connect 4.10 | 2.0.5 | Tony.Friar@NewKinetics.com | OK |
| BTL IPPhone, RADvision 1.0 | 2.0 beta 8 | cf@netskate.dk | OK |
| Centnet CNG2000 gateway | 0.17 | liuyu@centnet.com.cn | OK |
| CentralityComm PA1688 based Lan Phone | 2.0.3 | woody@centralitycomm.com | OK |
| Cirilium Call Manager | 2.0.3 | rafael@thinkfreak.com.br and felipe@thinkfreak.com.br | OK, but no H.323 in NATed networks |
| Cirilium Media Gateways | 2.0.3 | rafael@thinkfreak.com.br and felipe@thinkfreak.com.br | OK, but no H.323 in NATed networks |
| Cisco ATA 186-L-I2 | 2.0.1 | niclas.gustafsson@codesense.com | OK |
| Cisco ATA 186 | 2.0.6 | gsalas@manta.telconet.net | OK |
| Cisco 1750 | 2.0 beta 3 | sevk@maks.net | OK |
| Cisco 1751 | 2.0.2 | gene@amtkom.ru | OK |
| Cisco 1751V 4FXO IOS 12.2 | 2.0.3 | jimmyz@mail.ru | OK |
| Cisco 2610 gateway | 0.17 | kuan@infoserve.com.tw | OK |
| Cisco IP/VC 3511 MCU (sw 4.2.10) | 2.2.2 | sedivi.mark@chello.hu | OK |
| Cisco 3640 | 2.0.7 | peterzhao88@hotmail.com | OK |
| Cisco 3640 | 2.0.2 | jompigrande@hotmail.com | OK, Media Gateway as permanent endpoint |
| Cisco 3725 | 2.0.6 | alex.golyshev@mail.ru | OK |
| Cisco 5300 | 2.0.3 | thandy@seed.net.tw | OK |
| Cisco 5300, 5400 IOS 12.2,3 13.x | 2.0.2 | fred@ebone.at | OK |
| Cisco 5350 | 2.0.6 | alex.golyshev@mail.ru | OK |
| Cisco 5400 | 2.2.2 | sgaleotti@grupoalternativa.com | OK |
| Cisco 5400 | 2.0.2 | gene@amtt.ru | OK |
| Cisco AS5850 12.3(9) | 2.2 beta 4 | ianc@band-x.net | OK |
| Cisco 7206 | 2.0.2 | gene@amtkom.ru | OK |
| Cisco 7507 | 2.0.2 | gene@amtkom.ru | OK |
| Cisco 7905 | 2.0 | rdesalis@fx.net.nz | OK |
| Cisco 7905G | 2.0.6 | sbmannan@mail.com | Ok, specify H.323 firmware when ordering! |
| Cisco 7960 | 2.0.4 | Oleg.Ustinov@nectis.com | OK |
| Cisco IP/VC 3540 MCU module | 2.0 beta 9 | mwinckless@rspca.org.uk | OK, except proxy mode, set MCU to register as gateway to support prefixes |
| Cisco 3620 IOS 12.2T T H245 PRI Gateway | 2.0 beta 9 | mwinckless@rspca.org.uk | OK, some known Cisco H.323 implementation issues |
| Cisco 3660 Gateway | 1.0 | luigi.leopaldi@katamail.com | OK, must give H323-ID and put it in gatekeeper.ini |
| Cisco MC3810 | 2.0 beta 2 | jacke@bofh.pl | OK |
| Cisco 827-4V ADSL router | 2.0.3 | vmarco@hotmail.com | OK |
| Cisco AS5300 gateway | 1.0 | snapolskikh@hotmail.com | OK, see config notes |
| Cisco AS5350 IOS 12.3 | 2.0.6 | artur@dartel.ru | OK |
| Cisco C2600 IOS 12.3(24) | 3.0 | dfrankovic@carnet.hr | OK, incl. IPv4-to-IPv6 proxy |
| Cisco CallManager 3.1(3c) | 2.0 beta 9 | mwinckless@rspca.org.uk | OK, register as gateway |
| Cisco IAD 2431 | 2.2.1 | tugrul.kiyamcicek@probil.com.tr | OK |
| Cisco IP Softphone with Netmeeting Collaboration mode | 2.0 beta 9 | mwinckless@rspca.org.uk | OK, Netmeeting LDAP problem |
| Cisco IP/VC3510 MCU | 1.0 | adi@adis.on.ca | OK |
| Cisco IP/VC3520 gatekeeper | 1.0 | adi@adis.on.ca | OK as neigbour gatekeeper |
| Cisco MGCP 8 port E1 module Gateway via CCM | 2.0 beta 9 | mwinckless@rspca.org.uk | OK, some known Cisco H.323 implementation issues |
| Cisco VG200 | 2.0.8 | cristian.seva@voiplab.com | OK |
| Cisco ubr924 | 2.0.7 | florin@napocastar.net | OK |
| Citron CP-110 | 2.0 beta 4 | fbernal@neo-st.com | OK |
| Citron CP-310 | 2.0 beta 4 | fbernal@neo-st.com | OK |
| Clarent CallManager | 2.2.5 | nicky_larson_2002@hotmail.com | OK |
| Clarent GK | 2.2.2 | mlomaster@yahoo.com | OK, Clarent GK as endpoint, allow GW to GW calls |
| Clarent GW 3.1 | 2.0.8 | mr_ang@yahoo.com | OK, as permanent endpoint |
| Clipcomm CP-100/101 Phone | 2.0.2 | ahnjw@clipcomm.co.kr | OK |
| Clipcomm CG-101 Gateway | 2.0.2 | ahnjw@clipcomm.co.kr | OK |
| Codian ISDN Gateway v1.0/v1.1 | 2.2.3 | support@codian.com | OK |
| Codian MCU4200 v1.3/v1.4/v1.5 | 2.2.3 | support@codian.com | OK |
| Codian MCU4200 | 3.0 | | OK, incl. IPv6 |
| Codian MCU4220 | 3.0 | | OK, incl. IPv6 |
| Codian MCU4210 v1.5 | 2.2.8 | | OK |
| Codian IPVCR | 2.2.2 | william@codian.com | OK |
| CPM OGK | 2.2.0 | ehsan@telecanada.net | OK |