Line Capacity 4 ports built in, expandable to 24 ports
Voice Storage Up to 1000 hours
Automated Attendant Service Yes
Call Screening Yes
Live Call Screening Yes 
Remote Live Call Screening (DPITS only) Yes
Callback Number Entry Yes
Caller ID Name Annoucement Yes
Caller ID Personal Greeting Yes
Caller ID Routing Yes
Covering Extension  Yes
Custom Service Yes
Direct Mailbox Access Yes, DPITS only
Email Integration Yes
Enhanced Message Notification Yes
External Message Delivery Yes
Fax Detection Yes
Holiday Service Yes
Intercom Paging Yes, DPITS only
Interview Service Yes
Voice Mail Service Yes
Dialing Method DTMF
Flash Time No
CPC Detection No
Extension Numbering 2-5 digits (programmable)
Pause Time 100ms to 9900ms 
Message Waiting Lamp Yes
Main CPU 32-bit microprocessor
System Recording Time up to 1000 hours
Number of Mailboxes Max. 1024 boxes
Number of Messsages unlimited
Personal Greeting Message Length up to 360 sec.
System Message Retention Time
1-30 Days, or unlimited (programmable)
Maximum Message Length
1-60 min. or unlimited (programmable)
Telephone Line
Modular connector (RJ-11C) (2 conductor wire)
Data Port USB, LAN or Modem
Power Source AC 120V, 60Hz
Two-Way Record
Yes, DIPTS only
Two-Way Transfer Yes, DIPTS only
Automatic Configuration Yes, DIPTS only
Dial by Name Yes
Group Delivery Yes
Message transfer (with or without comments) Yes
Day/Night Service Yes
Voice Prompts Yes
System Reports Yes
Multilingual Service Yes
Remote Call Forwarding Set 3 Yes
Activity Reports Mailbox Information, Call Account, Port Usage, HDD Usage, Mailbox Usage, Fax Call, Call Handling Statistics, Custom Service, Message Status, Subscriber Setup, Security Information, Hourly Statistics and Email
Greeting, After Hours Yes
Greeting, Busy Yes
Greeting, No Answer Yes
Internal Message Delivery Yes
Mailbox Name Yes
Mailbox Password Yes
Message Delivery Satus Yes
Message Reception Mode Yes
Message Erase Yes
Message Fast Forward Yes
Message Pause Yes
Message Playback Yes
Message Repeat Yes
Message Rewind Yes
Message Save Yes
Message Scan Yes
Message Skip Yes
New Message Notification Yes
Play Previous Message Yes
Private Messages Yes
Reply to Subscriber(s) Yes
Time and Date Stamp Yes
All Calls Transferred to Mailbox Yes
Alternate Extension Transfer Sequence Yes
Auto Message Move/Copy Yes
Broadcast Message Yes
Call Blocking Yes
Call Transfer Status Yes
Class of Service Yes
Clock Synchronization with PBX Yes
Coverage Mode, Busy Yes
Coverage Mode, No Answer Yes
Daylight Saving Time Assignment Yes
Department Dialing Yes
External Message Delivery Status Yes
Fax Management Yes
Fax Transfer Yes
Group Distribution Lists, Personal Yes
System Groups Mailbox Yes
Hold Call Yes
Mailbox, General Delivery Yes
Mailbox, Guest Yes
Mailbox, Interview Yes
Mailbox, Message Manager Yes
Mailbox, Subscriber Yes
Mailbox, System Manager Yes
Message Waiting Notification, Continuous Yes
Message Waiting Notification, Outdial Yes
Message Waiting Notification, Pager Yes
Message Waiting Notification, Scheduled Yes
Multiple Company Greetings Yes
Operator Service, Day/Night Yes
Recordable System Prompts Yes
Rotary Telephone Service Yes
Service Access Commands Yes
System Clock Yes
System Prompts After Personal Greeting Yes
Unlimited Message Length Yes
Digital Integration Yes
In-band Integration Yes
PC-based Programming Yes
Quick Set-up Yes
System Manager Administration Yes
Utility Commands Yes
Voice Mail Menu Yes, with KX-TDA with LCD proprietary telephone entry
Remote Change of Company Greeting Yes
Built in Modem for Remote Maintenance Yes, optional
Spanish Prompts Yes
Dimensions (H x W x D) 10.63" x 19.29" x 15.75"
Weight 12.28 lbs.