| System features |
| Ports Max. 4-Slot 64 / 8-Slot 112 |
| Digital Stations Max. 4-Slot 32 / 8-Slot 112 |
| Analog Stations Max. 4-Slot 24 / 8-Slot 56 |
| Trunks Max. 4-Slot 56 / 8-Slot 64 |
| Page Relay 4-Slot 1 / 8-Slot 1 |
| One Pair Wiring |
| Account Codes |
| Alternate Attendant |
| Attendant Call Queuing |
| Attendant Position |
| Automatic Ring Down |
| Battery Backed-up Memory |
| Caller ID (with logging) |
| Delayed Ringing |
| Dial Number Preview |
| Dial Tone Detection |
| Direct Inward Line (DIL) |
| Door Box |
| Extended Ringing |
| Extension Hunting (UCD, Circular and Terminal) |
| External Alerting Devices |
| Flexible Numbering Plan |
| Group Ring |
| ISO 9002 Approved Manufacture |
| Music on Hold |
| Names for Extensions and Trunks |
| Night Service/Night Ring/Night Answer |
| Non-Blocking Architecture |
| Off-Premise Extension |
| PBX/Centrex Compatibility |
| PC Programming-Local/Remote |
| Ring Groups |
| Single Line Telephones/2-OPX Modules |
| Special Services and OCC Compatibility |
| Station Message Detail Recording |
| Station Overflow |
| System Diagnostics |
| System Identification |
| System Programming Password Protection |
| T1 Interface |
| System Timers |
| Time and Date |
| Toll Restrictions |
| Trunk Groups/Rotaries |
| Universal Night Answer |
| Voice Mail Compatibility |
| Station Features |
| Alphanumeric Display |
| Automatic Answer |
| Automatic Handsfree |
| Background Music |
| Barge In (Intrusion) |
| Call Coverage Keys |
| Call Forwarding |
| Call Forwarding Cancel |
| Call Timer |
| Call Waiting/Camp-On |
| Callback |
| Central Office Calls, Answering |
| Central Office Calls, Placing |
| Centrex Compatible Feature Keys |
| Class of Service |
| Conference |
| Direct Station Selection (DSS) |
| Direct Station Selection (DSS) Console |
| Direct Trunk Access |
| Directed Call Pickup |
| Directory Dialing (Company, Personal and Extension) |
| Distinctive Ringing, Enhanced |
| Do Not Disturb |
| Flash |
| Forced Trunk Disconnect |
| Group Call Pickup |
| Group Listen |
| Handsfree, Handsfree Answerback and Monitor |
| Headset Compatibility |
| Hold (with Recall Display) |
| Hotline |
| Intercept of Calls |
| Intercom |
| Key Ring |
| Last Number Redial |
| Line Keys |
| Loop Keys |
| Meet-Me Conference |
| Message Waiting |
| Microphone Mute |
| Off-Hook Signal |
| One-Touch Keys |
| Paging |
| Park (with Recall Display) |
| Prime Line Prefernces |
| Privacy and Privacy Release |
| Private Line |
| Programmable Function Keys |
| Pulse to Tone Conversion |
| Release Key |
| Removing Trunks and Extensions From Service |
| Reverse Voice Over |
| Ringdown Extension |
| Ringing Line Preference |
| Save Number Dialed |
| Selectable Display Messaging |
| Silent Monitor |
| Soft Keys |
| Speed Dial |
| Split (Alternate) |
| Tandem Trunking/Unsupervised Conference |
| Transfer (with Recall Display) |
| Trunk Group Routing |
| Trunk (Line) Queuing |
| User Programmable Features |
| Voice Over |
| Volume and Contrast Controls |