PBX Features
  Blind Transfer
  BLF Support
  Blacklist
  Call Back
  CDR(Call Detail Records)
  Call Forward
  Call Parking
  Call Recording
  Call Pickup
  Call Routing
  Call Transfer
  Call Waiting
  Caller ID
  Conference
  Define Office Time
  DDNS
  Dial by Name
  DISA(Direct Inward System Access)
  DIDs
  Distinctive Ringtone
  DND(Do Not Disturb)
  FAX (T.38)
  Firewall
  Follow me
  IVR (Interactive Voice Response)
  Intercom/Zone Intercom
  Mobility Extension
  Multi-language Prompt
  Music On Hold
  Music On Transfer
  One touch record
  OpenVPN
  Phone Provisioning
  PIN User ( PIN Code Control)
  Paging/Zone Paging
  PPPoE
  Queue
  Ring Group
  Route by Caller ID
  Skype Integration (Skype Connect)
  SMS to Mail/Mail to SMS
  Speed Dial
  Static Route
  Three-way Calling
  Voicemail
  Voicemail to Email
  Voicemail Forwarding
  Web Based Control Panel
  *TR069

 DISA(Direct Inward System Access)


Introduction:

An external caller can access internal pbx features on certain CO lines by keying in a special code.

The PBX answers the incoming call with dial tone, and the caller enters the access code (if required) and destination extension number or routing code.