Official Matrix Channel Partner in Zimbabwe

Telecoms Solutions


Eternity GE12S

Scalable VoIP to ISDN BRI Gateway

ETERNITY GE12S is a modular VoIP to ISDN BRI gateway scalable up to 384 IP channels and 32 BRI ports. The gateway interfaces with ISDN PRI PBX using programmable TE/NT ports. The gateway also connects PBX or key phone systems to an IP network.  It offers 16 SIP accounts with flexibility to register with various SIP providers and places calls via most cost-effective service providers.

Organizations with traditional ISDN PBX can now seamlessly migrate to IP, while preserving their existing communication infrastructure and dialing patterns. For organizations already migrated to IP, this gateways offers connectivity to fixed-line networks using BRI interface.

ETERNITY GE gateway is a future-proof and scalable solution to grow with the communication needs of an organization. With Matrix ETERNITY GE gateway, service providers and system integrators can effectively deliver carrier-grade services as well as enterprise based applications.



VoIP Gateway for ISDN PBX

  • Seamless connectivity to cost-effective IP network
  • Maintain existing PBX infrastructure and dialing habits
  • Programmable TE/NT Modes for easy integration
  • Direct IP and Proxy calling, even without Static IP
  • Compatible with all ISDN PBX
  • Scalable gateways- grow as per business need

ISDN BRI gateway for IP-PBX

  • ISDN BRI trunk connectivityfor IP-PBX
  • Deployable in all SIP based VoIP networks
  • Scalable gateways - grow as per business need


Key Features

  • Modular architecture with scalable VoIP and ISDN BRI channels 
  • Complete non-blocking architecture
  • Direct number dialing on the cellular networks with automatic number translation
  • Programmable TE/NT modes
  • Restrict unwanted calls with list of denied numbers
  • Simultaneous registration with multiple SIP Proxies
  • Emergency number dialing
  • Hotline extension setting



System Capacity:

Expansion Slots


Expansion Cards

16/32 VoIP Channels per Interface Card
4 ISDN BRI Lines per Interface Card


VoIP Port:


SIP v2, SDP, RTP (RFC 2833)


Ethernet (RJ 45)

SIP Accounts


Simultaneous VoIP Calls

16 to 384

Echo Cancellation

G.168 with up to 128ms Tail length

Voice Codecs

G.711 (A-law, µ-Law), G.723, G.729AB, GSM-FR, GSM-EFR and iLBC Voice Codec




Up to 32  BRI Ports



Operational Mode

Software Configurable NT/TE modes


S/T Interface, Point to Point and Point to Multipoint

Switch Variant

AT&T 4ESS, DMS-100, ETSI NET3, ITU-T Q.921,ITU-T Q.931, NTT INS64, US NI1 (National ISDN 1),France VNx Signaling


Power Supply:


Option 1 (Mains): 100-240 VAC, 47-63 Hz
Option 2 (DC): 48VDC +/- 20%

Power Consumption

50W (Typical)



Dimensions (WxHxD)

41.2x16.0x25.4cm (16.22"x6.29"x10.0")

Mounting Options

Wall Mount, Table Top and 19" Rack Mount

Operating Temperature

-10° C to +50° C (14° F to +122° F)

Contact Us

+263 4 790 791/5
+263 4 790 777
10th Floor, South Wing
Causeway Building
Cnr 3rd Street / Central Ave
Harare, Zimbabwe