PBX

Which numbers do I need

You need to remember the following numbers:

Number
42	Check that your phone works
43	Get these instructions read out
5xx	Call another handset
6X	Call a fixed phone at key locations
8	Your voicemail

Numbering plan

Each PBX / phone system has a numbering plan. GBEU Phone uses the following:

prefix	description
0.*	prefix for dialling out
1.*	reserved
2..	3-digit admin functions
3.*	unused
4.	2-digit automated announcements
5..	3-digit numbers for DECT handsets
6.	2-digit numbers for fixed phones
7.*	reserved for future use (groups)
8	Voicemail
9.*	reserved

Forward, Conferencing,

Asterisk supports several features like call forwarding, conferencing and others. These can be reached via your phone's keys. See the DECT handset and wired phone pages respectively.