- Cortelco Colleague corded two-line telephone
- 90V Message waiting lamp
- Handset volume control
- Hook delay (positive line disconnect)
- A-lead control
- Data jack
- Hearing aid compatible
-Hold with LED indicator (flip-flop type)
- Last number redial
- Flash (100-300-600mS) switchable
- 10 One-touch programming memory
- Mute with LED indicator (flip-flop type)
- Speakerphone with LED indicator
- Headset control switch
- Line in-use status with LED indicator
- Conference button
- Frost