SMS Gateway software
Ozeki brings you outstanding
SMS Gateway technology. Use our SMS Server products on Windows,Linux, or Android

Developers can use our C# SMS API to send SMS from C#.Net. The C# SMS API comes with full source code

The ozeki PHP SMS gateway software can be used to send SMS from PHP and to receive SMS usig PHP on your website

SMPP SMS Gateway
SMS service providers use our SMPP gateway solution, that offers a high performance SMPP server and SMPP client gateway with amazing routing capabilities
Ozeki Phone System

Ozeki Phone System Data Sheet

Ozeki Phone System Description
Product Name Ozeki Phone System
Category VoIP PBX Telephone System
Product Website http://www.ozekiphone.com/
Package Content OzekiPhoneSystem.exe
Redistributable .DLL (OPSSDK.dll)
Example applications
Main Task Makes it possible to build a business phone system with advanced features to ensure the best communication experience.
Supported Operating Systems Microsoft Windows 10
Microsoft Windows 11
Microsoft Windows 8
Microsoft Windows 7
Microsoft Windows Server 2022
Microsoft Windows Server 2019
Microsoft Windows Server 2016
Microsoft Windows Server 2012
Software Requirement Supported Web browsers:
  • Google Chrome
  • Microsoft Edge
  • Mozilla Firefox
  • Brave
  • Internet Explorer
  • Opera
  • Safari

.NET Framework 4.0
Outside Line Connectivity VoIP Service Provider
PSTN Device (FXO and FXS)
ISDN Phone Line
GSM Modem
SMPP Service Provider
E-mail Provider
Extension Connectivity SIP Extension
Ring group
Call queue
API Extension
Conference room
Echo/sound test
APIs for Development .NET API (OPSSDK.dll): Advanced API for .NET, to control the PBX and manage calls and messaging.

HTTP API: Setup voice calls, send SMS, configure your PBX using HTTP requests.

OzML: An advanced XML language to create an outbound or inbound IVR.

SQL API: Log call information to a database, schedule calls, send/receive SMS using SQL.

EXE Launcher: Launch your exe when a call comes in and take full control over the call.

Supported Programming Languages:
  • C# .NET
  • VB.NET
  • Java
  • PHP
  • Perl
  • Python
  • Ruby
  • Javascript
  • HTML
System Features Calling features:
  • Call recording
  • Attended transfer
  • Blind transfer
  • Call forward
  • Call rejection
  • Voice conference support
  • Call hold/unhold
  • Do not disturb (DND)
  • Multi-line support (multiple simultaneous calls)
  • Call logging
  • Call queuing
  • Conference calling
  • Call routing

  • SMS sending via GSM modem or SMPP connection
  • SMPP Server funcionality
  • Sending e-mail notifications about missed calls or new voicemails
  • Instant Messaging between softphones

Office user handling: It enables to organize users into different groups with different privileges. It also allows to assign more telephone numbers to a user.

  • VPN
  • TLS
  • SRTP
  • ZRTP

Call routing:
  • Inbound routing rules
  • Outbound routing rules
  • Missed calls
  • Messaging
  • Least cost routing

SIP-based phone system

NAT: STUN allows your to use the Ozeki Phone System behind NAT device to discover its public IP.

Learning mode: With enabled learning mode Ozeki PBX allows VoIP devices to register automaticaly their user account to the system. The first time they connect, a SIP account will be created automatically for them. This option results in automated SIP account creation.

SIP trunk mode: It allows to connect the Ozeki Phone System to another SIP based PBX.

Example Applications Auto Dialer: For delivering auto messages from your PC to any phones.

Broadcast By SMS: Enables interactive, customised messaging.

Broadcast By Email: Intelligent e-mail messaging solution.

Agent Dialer: The most excellent application for predictive dialling.

Call Center Client: Manage customer information in the most effective way.

Call Center Manager: Improve your business with call management tools.

IVR: Powerful interactive menu system designer and manager suite.

Call Recorder: Professional call recording software application.

Appointment reminder: For sending customised notifications from your PC.
Webphone Embedded telephone on a website: Calls can be made through the Ozeki Phone System from a web browser.
  • Click to call
  • Webphone with keypad
  • Chatphone
Supported VoIP Devices/Softphones Desktop IP Phones:
  • Linkpro
  • Yealink
  • Grandstream
  • Linksys
  • Cisco
  • Snom

  • Counterpath X-Lite
  • Counterpath Bria
  • ExpressTalk
  • Zoiper
  • DIAX
  • Damaka
  • AdoreSoftphone
  • MiniPAX
  • Ekiga
  • 3CX Phone

PSTN Device (ATA):
  • Linkpro
  • Linksys
  • Cisco
Supported Codecs Audio codecs:
  • PCMA (8)
  • PCMU (0)
  • telephone-event (101)
  • iLBC (98)
  • G722 (9)
  • GSM (3)
  • SPEEX (100)
  • SPEEX (97)
  • L16 (103)
  • G729 (18)
  • G728 (15)
  • G723 (4)
  • G726-16 (104)
  • G726-24 (105)
  • G726-32 (106)
  • G726-40 (107)

Video codecs:
  • H263-1998 (102)
  • H264 (99)
  • H263 (34)

RFC 2833:RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals

RFC 3261:Session Initiation Protocol

RFC 3263:SIP: Locating SIP Servers

RFC 3264:An Offer/Answer Model with the (SDP)

RFC 3265:SIP Event Notification

RFC 3420:Internet Media Type message/sipfrag

RFC 3428:SIP Instant Messaging

RFC 3489:STUN - Simple Traversal of UDP Through NATs

RFC 3515:SIP Refer Method

RFC 3550:Real-time Transport Protocol

RFC 3551:RTP Audio/Video Conference

RFC 3587:IPv6 Global Unicast

RFC 3666:SIP, PSTN, Call Flows

RFC 3725:Best Practices for Call Control

RFC 3842:Message Waiting Indication

RFC 3856:Presence Events in SIP

RFC 3891:The SIP Replaces Header

RFC 3892:SIP Referred-By Mechanism

RFC 3920:Extensible Messaging and Presence Protocol (XMPP): Core

RFC 4566:Session Description Protocol

RFC 5411:A Hitchhiker's Guide to the SIP