14 do not disturb (client based), 15 flexible extension logic, 16 music on hold – Welltech ePBX-100A-128 User Manual
Page 81: 17 music on transfer, 18 call pickup, 19 call park, 20 camp-on (call back on busy)

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the Caller ID as 101.
b) CLIR (database type): for example. 101 dial to "*31", ePBX-100A should add the CLIR
record for 101 into its database. When 101 call to 102, 103...,etc. The LCD of called party
should always show "Anonymous". 101 can dial to "*32" to disable this feature.
4.3.14 Do Not Disturb (Client based)
The ePBX-100A-128 can support “server DND”. User can dial to *78 to active it and
*79 to deactive. For example, extension 101 dial to *78, there will be an announcement to
notify you the DND is enabled, and someone call to 101 then the call will be rejected
directly.
4.3.15 Flexible Extension Logic
You can set the digits length of subscriber to 30 digits.
4.3.16 Music On Hold
The ePBX-100A-128 will play music if the user is under Hold status.
4.3.17 Music On Transfer
The ePBX-100A-128 will play music if the user is under Transfer status.
4.3.18 Call Pickup
The ePBX-100A-128 can support Call Pickup. For example: Ext-A is ringing, Ext-B can
press *8 for Global or Group pickup. You can also press **8 + ext number for specific call
pick up.
4.3.19 Call Park
By default, extension 700 is used to park a call. While in a conversation, press *0 to
initiate a blind transfer, and then dial 700. ePBX-100A will now announce the parking
extension, most probably 701 or 702. Now hang up - the caller will be left on hold at the
announced extention. Walk up to a different phone, dial 701 and the conversation can be
continued. If a caller has been parked for a longer time than 45 seconds, then ePBX-100A
will again ring the originally dialed extension.
4.3.20 Camp-On (Call Back on Busy)
For example, you dial to 101 but 101 is on the phone, then you should hear an
announcement for busy. You could dial to *66 by default to trigger the ePBX-100A call back
to you when 101 is idle. This function will let u talk to called party immediately when called
party is free.
This Function is only workable when voice mail function of called party is disabled.