| Line Capacity (ports) | 4 ports built in |
| Voice Storage | up to 128 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 Announcement | Yes |
| Caller ID Personal Greeting | Yes |
| Caller ID Call Routing | Yes |
| Covering Extension | Yes |
| Custom Service | Yes |
| Direct Mailbox Access | Yes, DPITS only |
| 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 | Tone/pulse (10/20 pps) |
| Flash Time | 100/300/600/900 msec (programmable) |
| CPC Detection | None/6.5/150/300/450/600 msec (programmable) |
| Type of Line | Loop start |
| Extension Numbering | 2-5 digits (programmable) |
| Pause Time | 1-9 sec (programmable) |
| Message Waiting Lamp | Programmable DTMF sequence |
| Main CPU | 16-bit microprocessor |
| System Recording Time | 64 Hours |
| Number of Mailboxes | Max. 1024 boxes |
| Number of Messages | Max. 100 per mailbox |
| Personal Greeting Message Length | 8-60 sec (programmable) |
| System Message Retention Time | 1-30 Days, or unlimited (programmable) |
| Maximum Message Length | 1-6 min. or unlimited (programmable) |
| Telephone Line | Modular connector (RJ-11C) (2 conductor wire) |
| Data Port | RS-232C interface port |
| Power Source | AC 120V, 60 Hz |
| Two-Way Record | Yes, DPITS only |
| Two-Way Transfer | Yes, DPITS only |
| Automatic Configuration | Yes, DPITS 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 Set3 | Yes |
| Activity Reporting |
Mailbox List, Class of Service List, System Service Report, Call Account Report, Port Usage Report, Mailbox Usage Report, Disk Usage Report, Fax Call Report, Custom Service Report Connections |
| Greeting, After Hours | Yes |
| Greeting, Busy | Yes |
| Greeting, No Answer | Yes |
| Internal Message Delivery | Yes |
| Mailbox Name | Yes |
| Mailbox Password | Yes |
| Message Delivery Status | 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 |
| Remote Change of Company Greeting | Yes |
| Built-In Modem for Remote Maintenance | Yes |
| Spanish Prompts | Yes |
| Dimensions (H x W x D) | 187/16" x 127/8" x 4" |
| Weight | 16.5 lbs |