How to setup Ozeki Phone System with Cisco Call Manager Express

This guide gives detailed instructions on how you can connect Ozeki Phone System with Cisco Call Manager Express, a small office PBX system developed by Cisco. Ozeki Phone System is fully compatible with this device. All solutions introduced on this website will work with Cisco Call Manager Express.

We would like to thank Gloster Telekom, for providing us a Cisco Call Manager Express device for testing.

gloster telekom
Figure 1 - Gloster Telekom

Cisco Call Manager Express is a VoIP solution developed by Cisco Systems. Cisco Call Manager Express supports the SIP protocol therefore you can use any kind of SIP desktop phone or softphone with it. After you have connected Ozeki Phone System to Cisco Call Manager Express, you can build your own application with voice and video support - it may be a standard softphone, an IVR system or a call center application.

System architecture

By following the configuration steps of this guide described below, you will have a telephone system managed by Cisco Call Manager Express, with at least one extension, and Ozeki Phone System softphone connected. After connecting various SIP endpoints to Cisco Call Manager Express, you can easily build various VoIP system infrastructures (Figure 2).

Figure 2 - Calling contacts via Cisco Call Manager Express

Configuration steps

Before you start to configure this solution it is assumed that you have already installed your Cisco Call Manager Express, and downloaded Ozeki Phone System XE installer from the download page.

Step 1.) Install Cisco Call Manager Express

Connect your 3rd party PBX with Ozeki Phone System. The computer where you install PBX will be a virtual machine or a computer. Start with a simple installation to co-operate with Ozeki Phone System. Follow the installation guide at Cisco CM Express wizard. Use the disk which you downloaded for 3rd party PBX. After you installed the software, configure the network:

In the command line interface use the "enable" command, which enables privileged EXEC mode. Then enter the global configuration mode with "configure terminal". Enter DHCP pool configuration mode with the selected name for the DHCP server address pool with "ip dhcp pool [name]".

#router>configure terminal
#router>ip dhcp pool [name]

Finally you should specify the IP address of the DHCP address pool with "network [IP address] [netmask]". Specify the router that the IP phones will use to send or receive IP traffic that is external to their local subnet If you finished you should add the "default-router [ip-address]". Use the simple "end" command to finish your configuration.

After that you can start to configure the SIP account for Ozeki Phone System connection.

Step 2.) Create a SIP account

Video: Cisco Call Manager Express setup

The first step you need to do is to configure your Cisco router running Cisco Call Manager Express on your network properly. You can connect your Cisco router via Console port (with a DB9 to RJ45 cable) or you can access the same console by telnetting into the router's IP address (Figure 2). After you have logged in you can start configuring the router, if you have sufficient privileges.

Type ena and config t to enter terminal configuration mode (Figure 3).

cisco console configuration
Figure 3 - Cisco console configuration

At first, you need to configure the voice service (Figure 4). Type in the following: