Migrate legacy PBX and PSTN E1/T1 trunks to SIP with one, two or four E1/T1 ports. Support ISDN PRI, SS7 and R2 MFC signaling, T.38/T.30 FoIP and SIP/IMS registration in a compact gateway.
Signaling support, channel capacity and regulatory approval depend on the selected configuration and destination market.
Choose the number of E1/T1 ports based on the PBX trunk count, PSTN interface and call volume of the site.
Compact digital gateway for a single E1/T1 trunk or small legacy PBX.
Two E1/T1 ports for medium PBX migration or dual-trunk routing.
Four E1/T1 ports for larger PBX, call center or carrier trunk projects.
All three configurations support ISDN PRI, SS7 and R2 MFC signaling with SIP/IMS registration and T.38/T.30 FoIP.
| Configuration | E1/T1 ports | Signaling | SIP accounts | Best for |
|---|---|---|---|---|
| 1 E1/T1 | 1 | ISDN PRI / SS7 / R2 MFC | Up to 256 | Small PBX or single trunk |
| 2 E1/T1 | 2 | ISDN PRI / SS7 / R2 MFC | Up to 256 | Medium PBX or dual trunk |
| 4 E1/T1 | 4 | ISDN PRI / SS7 / R2 MFC | Up to 256 | Larger PBX or call center |
Channel capacity, signaling options and feature support vary by configuration and firmware. Confirm the PSTN/PBX interface and regulatory requirements before ordering.
The gateway bridges legacy E1/T1 networks to SIP while preserving voice, fax and modem/POS services.
| Digital trunk | 1, 2 or 4 E1/T1 ports; E1/T1 trunk interface to PBX or PSTN |
| Signaling | ISDN PRI, Q.sig, SS7, R2 MFC |
| VoIP | SIP v2.0, SIP-T, SIP/IMS registration with up to 256 SIP accounts |
| Fax | T.38/T.30 and FoIP pass-through |
| Voice codecs | G.711a/μ, G.723.1, G.729A/B, iLBC, AMR |
| Network | 2 GE ports; VLAN 802.1p/q; NAT; DTMF RFC2833 / SIP Info / In-band |
| Management | Web GUI, SNMP, auto provisioning, configuration backup/restore, CDR, syslog, firmware upgrade |
| Applications | Legacy PBX migration, E1/T1 PSTN trunking, call centers, FoIP, modem/POS |
This is a product-family summary. Confirm the exact E1/T1 interface, signaling variants, channel capacity and certification for the selected configuration.
Use the gateway at the edge of an existing PBX, PSTN trunk or contact center platform without replacing the digital interface.
Connect an existing E1/T1 PBX trunk to a SIP IP PBX, softswitch or cloud voice platform while keeping the PBX in service.
Fit: 1 or 2 E1/T1 ports for small and medium PBX migration.
Terminate E1/T1 service-provider trunks into SIP for enterprises, call centers and multi-site voice networks.
Fit: 2 or 4 E1/T1 ports for higher trunk count and call volume.
Preserve fax, modem and POS traffic with T.38/T.30 FoIP while voice runs over SIP.
Fit: 2 or 4 E1/T1 ports for contact centers and mixed voice/data applications.
Tell us about the PBX, PSTN interface, signaling and SIP platform. We will help select the right 1, 2 or 4-port configuration.
Share your project scope and we will respond with a tailored plan.