Based on consumer reaction, most users prefer a 3 digit extension. This is simple to do in “PBX internal options: General “ Simply remove the last digit from extensions for the first 7 entries. The last three need to be filled in to avoid exceeding “700”. Save and Apply Changes before moving on.
Now, you are to create your extensions, Navigate to “PBX Basic/Call Routes: Extensions”. Choose “Batch and SIP Extensions” to get the screen below. This will allow you to create all extensions as common template. Later you will make changes on each extensions.
If you are fine with the starting extension number , you can skip to “Create Number”. This value should be the total number of extensions, including cordless and door phones. “Permission” would be the level of calling the user would be permitted from this extension. If most extensions are getting voicemail, check “Enable Voicemail”. If only one, like this example, just leave it blank. “SIP/AIX Password” is used by phone to log onto the UCM. Unless you have a high security concern, you should choose a common password for all. In the case of the Voicemail passcode, choose a common passcode, as all users should change it when they setup their voicemail anyway. When done “Create Users” and “Apply Changes”
This is the time to name all the extensions. Click on the “Pencil” to edit, fill in the name of the extension, it can be the name of the location or person using it. In the below scenario the library is the room that will have the voicemail box. Voicemail is enabled and the passcode set. Then save and apply changes before closing the configuration field.
Connect all the phones to the network and allow them to boot up. It will be useful to have the last 4-5 digits of Mac address on same model phones to tell them apart. Navigate to “PBX: ZERO Config: Zero Config” you should see the list of all devices that the UCM found on the network. If the phone are not visible at the moment, you can continue the system programming , but phones will not work until this section is completed. The Grandstream IP Phones should be identified by model and MAC address.
Click on the “Pencil” icon to edit, place a check by “Account 1” and use the drop-down to pick up the preferred extension number. There are advanced options and MPK buttons that can be set here, but this will not apply in this scenario. When the settings completed, the system will notify the phone of its extension number, name and password.
For MPK with programmable buttons, you can pre-program those buttons here
It is done, next step is to setup the "Ring Group" to extensions.
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