| Version | FXO | FXS | Ethernet | Video Input | PSTN Thru Line | Codec |
| GXW4104 | 4 | 0 | 2 LAN/WAN 10/100Mbps | H.264 | 0 | G711u/a, G723, G729,GSM and T.38 compliant |
| GXW4108 | 8 | 0 | 2 LAN/WAN 10/100Mbps | H.264 | 0 | G711u/a, G723, G729,GSM and T.38 compliant |
| GXW4004 | 0 | 4 | 2 LAN/WAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726, G.729a/b/e, iLBC, and T.38 compliant |
| GXW4008 | 0 | 8 | 2 LAN/WAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726, G.729a/b/e, iLBC, and T.38 compliant |
| GXW4024 | 0 | 24 | 2 LAN/WAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726, G.729a/b/e, iLBC, and T.38 compliant |
| GXW4216 | 0 | 16 | 2 LAN/WAN 10/100/1000Mbps | No | 1 | G.711 (a/μ law), G.723, G.726, G.729a/b/e, iLBC, and T.38 compliant |
| GXW4224 | 0 | 24 | 2 LAN/WAN 10/100/1000Mbps | No | 1 | G.711 (a/μ law), G.723, G.726, G.729a/b/e, iLBC, and T.38 compliant |
| GXW4232 | 0 | 32 | 2 LAN/WAN 10/100/1000Mbps | No | 1 | G.711 (a/μ law), G.723, G.726, G.729a/b/e, iLBC, and T.38 compliant |
| GXW4248 | 0 | 48 | 2 LAN/WAN 10/100/1000Mbps | No | 1 | G.711 (a/μ law), G.723, G.726, G.729a/b/e, iLBC, and T.38 compliant |
| HT701 | 0 | 24 | 1 LAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726-32, G.729a/b, iLBC, and T.38 compliant |
| HT702 | 0 | 2 | 1 LAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726-32, G.729a/b, iLBC, and T.38 compliant |
| HT704 | 0 | 4 | 1 LAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726-32, G.729a/b, iLBC, and T.38 compliant |
| HT502 | 0 | 2 | 2 LAN/WAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726-32, G.729a/b, iLBC, and T.38 compliant |
| HT503 | 2 | 1 | 2 LAN/WAN 10/100Mbps | No | 1 | G.711 (a/μ law), G.723, G.726-32, G.729a/b, iLBC, and T.38 compliant |