Connect analog phones, fax machines, POS terminals and legacy PBXs to SIP, IMS and cloud voice. Choose 8, 16, 24, 32, 48, 64, 72 or 96 FXS ports for branch offices, hotels, campuses and carrier projects.
Port count, network interfaces, power and rack options vary by model; final configuration is confirmed in the project design.
An IAD voice gateway connects analog FXS endpoints to an IP voice network. Analog phones, fax machines, POS terminals and legacy PBX extensions keep their existing wiring, while calls are carried over SIP, IMS or a cloud PBX.
The series covers 8 to 96 FXS ports, so the same product family can serve a small branch office, a hotel with hundreds of rooms, a campus or a carrier project. High-density models put up to 96 FXS ports in a 1U chassis and support RJ11 or RJ21 cabling options.
Voice processing, T.38/T.30 fax, echo cancellation, VLAN/QoS and security features are handled at the gateway. Web, Telnet, SNMP and TR-069 management let IT teams configure and monitor distributed sites remotely.
The IAD sits between the existing analog endpoints and the IP voice platform. The PBX can stay in place, be retired, or be replaced by a cloud PBX depending on the project.
Existing analog devices connect to FXS ports through their current RJ11 wiring; high-density models can use RJ21 cabling.
The gateway converts analog voice to SIP, handles fax and DTMF, and applies voice quality, VLAN/QoS and security policies.
Calls connect to an IP PBX, IMS/NGN platform or cloud voice service; IT manages the gateway through Web, Telnet, SNMP or TR-069.
FXS ports connect to analog endpoints; the uplink is SIP over IP. The IAD does not replace the PBX unless the PBX itself is being retired.
The series covers 8, 16, 24, 32, 48, 64, 72 and 96 FXS ports. Use the capacity matrix to shortlist a model, then confirm interfaces and power options for the project.
Small office, clinic, shop or branch with a few analog phones.
1 WAN + 1 LAN GESmall hotel, office or branch with fax and front-desk phones.
2 GE portsBranch office or small hotel with room phones and back office.
2 GE portsMid-size branch, serviced apartment or small campus building.
2 GE portsHotel or enterprise site with multiple floors and departments.
1U high-density · RJ11/RJ21Large branch or hotel; exact interface and power options vary.
Model-dependent configurationHigh-density hotel or campus building with room phones and fax.
1U · GE redundancy · optional redundant powerLarge hotel, resort or campus site that needs maximum density.
1U · 95W · RJ11/RJ21Capacities are series options. The 64-port configuration and exact interface mix depend on the selected model and market availability; confirm the datasheet before ordering.
The IAD series combines the analog interface, voice processing and security features needed to move legacy voice services onto SIP.
Standard SIP v2.0 over UDP/TCP/TLS connects to cloud PBX, IP PBX, IMS/NGN and mainstream softswitch platforms.
T.38, T.30 and pass-through fax keep fax machines working, while analog POS terminals can share the same FXS infrastructure.
G.711A/U, G.723.1, G.729A/B, G.726, iLBC and AMR are supported, with echo cancellation up to 128ms, CNG and VAD.
Layer 3 DiffServ, 802.1P/Q VLAN tagging, STUN and static/dynamic NAT help voice traffic cross enterprise networks cleanly.
SIP TLS and SRTP protect signaling and media; multi-level user permissions and Web/Telnet access rules limit administrative risk.
Call waiting, forwarding, DND, three-way conference, voicemail, hunting group, speed dial and recording cover daily business use.
Web, Telnet, SNMP and TR-069 cover local setup and remote operations, while redundancy options protect high-density sites.
The same IAD family supports branch offices, hotels, campuses and carrier projects with different port densities.
Connect existing analog phones and fax to a cloud PBX or SIP platform without replacing the cabling.
Fit: 8–32 FXS ports for offices, clinics, shops and small branches.
Keep guest-room analog phones, fax and POS terminals while moving hotel voice to SIP or a cloud PBX.
Fit: 24–96 FXS ports, with high-density 1U models and RJ21 cabling for larger properties.
Use 48–96 port models in equipment rooms and manage distributed sites through SNMP/TR-069.
Fit: carriers, ISPs, campuses and multi-building projects that need dense FXS access.
The table summarizes the IAD series. Exact port count, interface, power and physical specifications depend on the selected model.
Common capabilities across the IAD series.
| FXS ports | 8 / 16 / 24 / 32 / 48 / 64 / 72 / 96 (model-dependent) |
| Analog interface | RJ11; RJ21 optional on high-density models |
| Uplink | 8-port: 1 WAN + 1 LAN GE; 16/24/32-port: 2 GE; 48/72/96-port: GE 1+1 redundancy |
| VoIP | SIP v2.0 (RFC3261) over UDP/TCP/TLS |
| Fax | T.38, T.30 and pass-through |
| Voice codecs | G.711A/U, G.723.1, G.729A/B, G.726, iLBC, AMR |
| QoS / VLAN | Layer 3 DiffServ, 802.1P/Q VLAN tagging |
| NAT / IPv6 | STUN, static/dynamic NAT; IPv4/IPv6 |
| Security | TLS/SRTP, multi-level user permissions, Web/Telnet access control |
| Management | Web, Telnet, SNMP v1/v2/v3, TR-069, HTTP/HTTPS auto provisioning, Syslog, CDR |
| FXS features | Caller ID DTMF/FSK, MWI, polarity reversal, pulse dialing 10/20 PPS, max line length 3–5 km (model-dependent) |
| Call features | Call waiting, forwarding, DND, three-way conference, voicemail, hunting group, speed dial, recording |
High-density models and ordering considerations.
| Item | Series Notes |
|---|---|
| Form factor | Desktop or 1U rack, model-dependent; high-density 1U supports up to 96 FXS |
| Power | 95W for 48/72/96 high-density models; other models vary |
| Redundancy | GE 1+1 on high-density models; optional redundant power for 48/72-port models |
| Cabling | RJ11 standard; RJ21 optional on high-density models |
| Line length | Up to 3–5 km depending on model and cable conditions |
| Operating environment | Confirm the datasheet for the selected model |
| Port options | 8, 16, 24, 32, 48, 64, 72 and 96 FXS series options |
This is a series summary, not a single-model datasheet. Port count, interface mix, power, dimensions and environmental specifications must be confirmed for the selected model before ordering.
Start with the analog endpoints, then choose capacity and confirm the uplink and management requirements.
Count analog phones, fax machines, POS terminals and PBX extensions, then add spare ports for future rooms or desks.
Use 8–32 ports for branches, 48–96 for hotels and campuses, and confirm whether RJ11 or RJ21 cabling is required.
Check SIP/IMS compatibility, GE uplink redundancy, power options, and whether SNMP or TR-069 is required by the operator.
Tell us about your analog endpoints, port count, PBX/PMS environment and SIP/IMS platform. We will help define the right IAD model and deployment plan.
Share your site scope and we will respond with a tailored plan.