Release & Upgrade
Release Notice for RMS V2.5.24
Release Notice for UMSV1.1.41
Finder v1.0.9
OM50G V177 P2.2
OM20G V177 P2.2
NeeHau Client V2.0.0.23 (with OM20/20G/50/50G)
OM20G V177 P2
OM50G V177 P2
OM80E V177 P3

What is the purpose of SIP in VoIP?
The Difference Between PBX And PSTN
What Is The Meaning Of Hosted Pbx ?
How Do You Choose An IP PBX For Your Small Business?
How To Install New Rock OM20 IPPBX-OM20g Installation
Why are PBX's Becoming VoIP Based?
What's the Meaning of PBX And How does a PBX system work?
How Is Ip Pbx Different From Traditional PBX?
How does a hotel phone system work?
What is PSTN gateway?
Is VoIP Phone worth it for a small business?
The Difference Between A Ip Phone And A Voip Phone
Can you use your old phone with VoIP?
What Is The Sip Response Code?
What is VoIP Server And How a VOIP Server Works
What is SIP 500 error
What Is Voip Gateway
Ip-pbx Vs Voip Gateway
Best PBX Phone System Features for Businesses
How to Setup a VoIP System in Office
PBX Software Features
Traditional IP PBX configurations
How to choose business telephony system
IP PBX vs. Traditional PBX
PBX IP PBX and VoIP technology Advantages
Guide to Business VOIP PBX
PBX phone systems for small businesses
How Does a SIP Gateway Work?
SIP, VOIP & IP Phones
VoIP Phone Systems - Create the Perfect Business Phone System
What Is a PBX Phone System
How much business Phone System
What is a PBX System
Why use VOIP
What are the advantages of VoIP services
FXO/FXS Gateways
Which Voip Phone System Is Right for Your Business
How do I choose a VoIP provider
Flexible Hotel Phone Systems From New Rock
How Can VoIP Help Hotels Cut Cost
Hospitality Technology Solutions
Modern phones for hotel rooms
VoIP to the hospitality industry
Hotel phone system improves hotel service experience
Why is a Hotel Phone System Important
How Hotel Phone Systems
The Importance Of Using Hotel Phone System
Hotel VOIP telephone system
Small Hotel Phone System for up to 50 Rooms
How Hotels Use a PBX Phone System

Application Notes
How to Integrate MX Gateway with OM IP-PBX
Interconnect Two PBXs with FXO Gateways
Interconnect Two or More Extension Lines with FXS Gateways
Connecting MX100G-S SIP-ISDN Gateway to Elastix
Connecting MX100G-S SIP-ISDN Gateway to Asterisk
Expanding PBX Extensions to Remote Sites through IP Network
Multi-site Configuration for Gateways with Analog PBX
How to Troubleshoot Caller ID Detection Issues on FXO Port
Security Configuration Guide for New Rock OM Series IP-PBX
Connecting FXO Gateway to Asterisk
Connecting FXO Gateway to Elastix
Tie Trunk Configuration for OM with Elastix

Training Materials
What is VoIP gateway?
What’s the Difference between VoIP Gateway and SIP Trunk?
Smart Switchboard Introduces Exclusive Premium Customer Services
What's the Difference Between VoIP Gateway and ATA?
What's the Difference Between VoIP gateway and SBC?
New Rock’s New Gateway Security measures
Global VoIP Gateway Service Provider
How to Setup VoIP Gateway - A Complete Installation Guide
What is HX&MX VoIP Gateway Default Password?
Auto Provisioning
Six Practices for Audio Security
“PSTN failover” - Strong Support for High-availability IP Audio Communications
New Rock IP-PBX: Your All-In-One IP Office Telephony System
Connecting E1/T1-Based PBX to IP Telephony Networks
Popular IP-PBX Features Favored by Highly Efficient Officers
Five-star Customer Services
Top Three Advantages of Gateways with Imbedded VPN Clients
Low-Cost, High-Quality Gateway
Smart FoIP
Two Typical Applications for Telephone Networks
IPv6’s Top Three Advantages in VoIP Applications
MX100G-S SIP-ISDN Trunking Gateway Training
MX Series VoIP Gateway Training


Installation & Maintenance
OM SIP Trunk Configuration Documentation
NAT Traversal Service---Configuration video
User Guide for Finder V1.0.9
IP-PBX Installation (Video)
OM20G&OM50G Quick Installation Guide
OM80E Quick Start Guide
OM200G Quick Start Guide
OM500 Quick Installation Guide
HX4G&MX8G Quick Reference Guide
MX60E Quick Installation Guide
MX120G Quick Installation Guide
MX100G-S Quick Start Guide
SX3000 Quick Installation Guide
PT2400 Quick Installation Guide
PT4800 Quick Installation Guide

Marketing Materials

What is PSTN gateway?
Update Time:2021-09-08 17:05:28 Browse Times:956 Amount Downloads:1

PSTN always be known as a ‘telephone line’.This is the most commonly used method by all users that only have the need to use one line for one conversation at a time using only one phone number.As a dedicated service, a PSTN line cannot be used for any other purpose while a call is being made. A PSTN phone number is equivalent to one phone line.The following will show you what does PSTN mean .

PSTN Gateways Introduction

Public switched telephone network (PSTN) gateways are third-party hardware components that translate signaling and media between the Enterprise Voice infrastructure and the PSTN, either directly or through connection to SIP trunks.

In either topology, the gateway terminates the PSTN. The gateway is isolated in its own subnet and is connected to the enterprise network through the Mediation Server.

An enterprise with multiple sites would typically deploy one or more gateways at each site. Branch sites can connect to the PSTN either through a gateway, or through a Survivable Branch Appliance, which combines gateway and servers in a single box. If branch sites use a gateway, both a Registrar and Mediation Server are required on site, unless the WAN link is resilient. One or more Mediation Servers, which are collocated on Front End Servers, can route calls for the one or more gateways at each site. We recommend that the Registrar, Mediation Server, and gateway required on site are deployed as a Survivable Branch Appliance.

Determining the number, size, and location of PSTN gateways is perhaps the most important and expensive decision you must make when planning your Enterprise Voice infrastructure.

Here are the main questions to consider. Keep in mind that the answers to these questions are all interdependent

How many PSTN gateways are needed? The answer depends on the number of users, the anticipated number of simultaneous calls (traffic load), and the number of sites (each site needs one).

What size should the gateways be? The answer depends on the number of users at the site and on the traffic load.

Where should the gateways be located? The answer depends in part on the topology and in part on the geographic distribution of your organization.

You should also consider your gateway topology options (for details, see Gateway Topologies later in this topic).

How Do PSTN Phone Lines Work?

Think of a Public Switched Telephone Network (PSTN) as a combination of telephone networks used worldwide, including telephone lines, fiber optic cables, switching centers, cellular networks, as well as satellites and cable systems. These help telephones communicate with each other.

Put simply, when you dial a phone number your call moves through the network to reach its destination – and two phones get connected. To fully understand how a POTS actually works, consider what happens when you dial a number from your own phone.

Step #1 - Your telephone set converts sound waves into electrical signals. These signals are then transmitted to a terminal via a cable.

Step #2 - The terminal collects the electrical signals and transmits these to the central office (CO).

Step #3 - The central office routes the calls in the form of electrical signals through fiber optic cable. The fiber optic conduit then carries these signals in the form of light pulses to their final destination.

Step #4 - Your call is routed to a tandem office (a regional hub responsible for transmitting calls to distant central offices) or a central office (for local calls).

Step #5 - When your call reaches the right office, the signal is converted back to an electrical signal and is then routed to a terminal.

Step #6 - The terminal routes the call to the appropriate telephone number. Upon receiving the call, the telephone set converts the electrical signals back to sound waves.

This may sound complicated, but the thing to remember is that it takes a few seconds for your call to reach its destination. This process is facilitated by using fiber optic cables and a global network of switching centers.

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