Voice VLAN on HPE OfficeConnect 1920S.

Introduction In this post we will configure voice vlan on HPE OfficeConnect 1920S switch. The switch will be used for connecting Cisco 8851 IP phone, which will detect the Voice VLAN and get an IP address from the correct VLAN. The PC connected through the IP phone will remain in a Data VLAN. The exact

IRF stack configuration (2 x HPE 5130 switches).

Introduction In this article we will setup an IRF stack with two HP 5130 switches that run Comware OS. What is IRF? IRF (Intelligent Resilient Framework) is a proprietary virtualization/stacking technology used in some HPE switches. It has been developed originally by H3C, but later HPE acquired H3C. IRF allows us to interconnect several switches

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 verify a checksum in Linux?

Introduction In this article we will learn how to calculate and verify a checksum of a file in Ubuntu. We will also see what a checksum actually is and why we should care. You can jump straight to the CLI commands. What is a checksum? A checksum (also called a hash or a digest) is

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

OpenLDAP operations (ldappasswd).

Introduction. In this post we will see how we can reset password for our OpenLDAP users using the special utility ldappasswd. Change user password using admin credentials. When it comes to resetting user passwords, one of the most common things is to reset user’s password providing our admin credentials. Let’s change the password for the

OpenLDAP operations (ldapadd).

Introduction This post will cover another important LDAP data manipulation – adding new entries to the directory tree. We will be using ldapadd utility. Prerequisite I assume that you have a working OpenLDAP server and OpenLDAP client. You might want to read this post which explains step by step how to install and run OpenLDAP