Category: VoIP

Load SIP Firmware to Cisco 7900 IP Phones.

Introduction In this post we will learn how to upload SIP firmware to Cisco 7911 IP Phone. This will make possible using the phone with third party SIP servers. The instruction below applies to all Cisco 7900 series IP phones. Step 1. Download the SIP firmware. Before we start, let’s download the required SIP firmware

Cisco IP Phone Firmware Upgrade on CME.

Introduction This article show step by step how to upgrade the firmware of a Cisco IP phone managed by CME(Call Manager Express). I will be upgrading Cisco 8851 IP phone(from version 12-0-1-11 to 12-5-1SR3-74) using Cisco ISR4331/K9 router as a CME. Step 1. Download the firmware files The first thing we need to do is

Call Queues in FreePBX.

Introduction In this article we will go through all the steps required to configure call queues in FreePBX 13. Call Queuing is a feature of almost any call center which allows you to keep incoming calls in a queue while they are waiting for their turn to be served by agents. Requirements I assume that

How to bypass SIP blocking by ISP?

Introduction In this article we will see how we can bypass SIP traffic blocking. There are a lot of countries where local ISPs block SIP traffic. It makes it impossible for enterprises or private persons to leverage from low rates on international calls provided by various SIP trunk providers. Solution One of the solutions is

Shared Lines in FreePBX.

Introduction In this post you will learn how to configure multiple IP phones with the same extension in FreePBX. This extension is usually called shared line, because it is shared by different devices. Using shared lines is very convenient when you have two or more devices and want to be able to answer the incoming

Cisco IP Phone “Host Not Found” error.

Introduction This post explains why you are getting “Host Not Found” error on your newly registered IP phone’s display and how to fix it. Why “Host Not Found” error? The reason you are getting this error is that when you autoregister a brand new IP phone, it attempts to take you through the self-provision wizard,

Cisco UCCX 11.5 Basic IVR Application

Introduction In this post we will create a basic IVR application on Cisco UCCX 11.5 server. Our application will play out the greeting to the caller and allow him to enter the extension number or wait for being transferred to the operator. Prerequisites Before you go through this tutorial you should have a working UCCX

Cisco UCCX 11.5 + CUCM 11.5 Integration

Introduction In this article we will go through the integration process of UCCX (Cisco Unified Contact Center Express) 11.5 with CUCM (Cisco Unified Communications Manager) 11.5. The process will be similar for other software versions as well. CUCM side: 1. Enable AXL Web Service on CUCM Go to Cisco Unified Serviceability -> Service activation and

How to configure Native Call Queuing in CUCM ?

Introduction In this post we will go through the process of configuring Native Call Queuing in Cisco Unified Communications Manager 11.5. This allows us to have basic call queuing functionality with periodic announcements without implementing Cisco Contact Center Express/Enterprise. How to configure native call queuing? Below are the required steps to get Native Call queuing