Amertrade Latin America C.A.

EZLoop PSTN Gateway FX04

EZLoop PSTN Gateway FXO4 behaves as a bridge between local PSTN and IP network for voice and FAX services. The PSTN Gateway transports voice and FAX services between PSTN and IP network without any distortion.

The EZLoop PSTN Gateway FXO4 provides voice and fax services over IP network with H.323 v3 or SIP RFC3261 protocol. By connecting with your existing ADSL or cable Modem service, this allows the use of a single network
for voice and fax services and reduced telephone charges. The ABLA EZ PSTN Gateway is an ideal solution for providing low cost communications between headquarters and branch offices in the world, as
well as for SOHO and office telephony applications.

The EZLoop PSTN Gateway FXO4 provides up to four (4) FXO ports connecting to local PSTN. It is an
interface to access PSTN with IP-PBX solution. A 10Base-T interface connects local Ethernet network with IP Phone and H.323 Gatekeeper or Call Manager. The data and voice services are working in a local Ethernet network. The TOS setting of EZLoop PSTN Gateway FXO4 provides voice priority in IP network.

Using two wire loop start Foreign Exchange Office (FXO) interfaces, EZLoop PSTN Gateway FXO4 convert packetized Voice and FAX to local circuit switching PSTN network. It also converts the voice and fax traffic to IP network with packetized form. The packetized data is sent via an Ethernet connection to IP network.

EZLoop PSTN Gateway FXO4 provides management features for system Configuration, Debug and Maintenance via RS-232C COM port and TELNET. TELNET/Web and COM port interface provide local / remote configuration, Management and software download. By using this feature, for ITSP/ISP provides centralized control to remote sites.


ITU-T H.323 v4 / SIP RFC3261compliance

Behind NAT router or IP sharing device

Behind NAT router or IP sharing device

Automatically Gatekeeper Discovery

Provide peer-to-peer mode (Non Gatekeeper needed) selection

Support auto-attendant (Tone or voice greeting)

Line hunting

PSTN Polarity Reversal Detection

4 RJ-11 FXO ports

Provide 2nd dial tone to PSTN

E.164 Common Dial Plan

DTMF Dialing

DTMF detection / generation

TFTP/FTP software upgrade

Remote configuration / reset

LED indication for system status

LAN interface : One RJ-45 connector for 10Base-T

MS-NetMeeting v3.0 compatible

Support Fix IP and DHCP

Provide QOS function with TOS (Type of Services) setting

Provide T.38/FAX and voice Auto-Switching



IP-PBX access to local PSTN call

Dialing PSTN call from carrier-based IP network

PSTN to PSTN call via IP network

Saving cost for international or long distance call

ITSP (Internet Telephony Service Provider)

Multi-nation Enterprise; SOHO


Easy access to PSTN from IP

Cost saving - save long and international call expense by using IP network.

No extra investment - just take advantage of existing Ethernet LAN and IP environment.

Easy interface with Cable Modem, ADSL Modem and Leased Line equipment

Space saving - compact size: 221mm(W)*42mm(H)*217mm(L)


A 10BaseT Ethernet RJ45 port

Asynchronous Console RS-232C DB-9 connector

Two Analog PSTN RJ-11 port for EZLoop PSTN Gateway FXO2 version only

Four Analog PSTN RJ-11 port for EZLoop PSTN Gateway FXO4 version only

Six Analog PSTN RJ-11 port for EZLoop PSTN Gateway FXO6 version only

AC power input outlet

AC power switch

Audio Feature

Codec -- G.711 A/u-Law, G.723.1, G.729A, G.729

VAD (Voice Activity Detection), CNG (Comfort Noise Generate)

G.168/165-compliant adaptive echo cancellation

Dynamic Jitter Buffer

Bad Frame Interpolation

Up to six FXO analog port

Completed voice band signaling support

Receive Caller ID (DTMF or FSK) from PSTN

Provide Inbound or Outbound DTMF generation/detection between LAN and PSTN interface

Call Transfer (H.450.2)

Call Hold (H.450.4)

Gain/Attenuation Settings

Provide Progress Tone: Dial tone, busy tone, call-holding tone and ring-back tone

LED Indicator for System Status

L1 to L2: LED indicator for PSTN port 1-2 status for EZLoop PSTN Gateway FXO2 version only

L1 to L4: LED indicator for PSTN port 1-4 status for EZLoop PSTN Gateway FXO4 version only

L1 to L6: LED indicator for PSTN port 1-6 status for EZLoop PSTN Gateway FXO6 version only

POWER : Power ON indication

LINK / ACT : 10 Base-T status

STATUS : EZLoop PSTN Gateway register to Gatekeeper status

READY : EZLoop PSTN Gateway works status

Management Features

Console port : RS-232C port



Dimensions : 221mm(W)*42mm(H)*217mm(L)

Weight(unit): 1.4 kg

Application Diagram

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