Manual for DPH-540

Manual for DPH-540

Brand: D-Link

Category: Networking

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 8:19 p.m.

Manual Publish Date: 2006-06-12

Warranty Information

Hardware is warranted for one year, power supplies and fans for one year, and spare parts for 90 days.

  • Switching the Phone On or Off: Press and hold the PWR/END key.
  • Power Saving Mode: The LCD turns dark after 15 seconds of inactivity. Press any key to wake it up.
  • Adjusting Volume: Use the Up/Down keys to adjust the volume. The level is shown on screen.
  • Making a Call: Enter numeric keys and press SEND, or go to Menu > Select to view Phonebook.
  • Answering a Call: Press SEND to accept, or PWR/END to reject.
  • Key Lock: Press and hold # key in standby, or go to Settings > Keypad > Keypad Lock.
  • Unlock: Press and hold # key, then press OK.
  • Viewing Recent Calls: Access Call Log > Dialed Calls/Received Calls. Redial by pressing SEND.
  • Returning an Unanswered Call: Access Call Log > Missed Calls.
  • Transferring a Call: Press the Hold icon to put on hold, then dial 3rd party numbers and press SEND.

Troubleshooting and error codes

Problem Solution
Unable To Register With The SIP Server?
  • Make sure the Internet and the SIP proxy server are reachable.
  • Make sure the SIP account and the password are correct.
Which Codec Should I Choose?
  • Codec choice depends on support by both ends of the VoIP host. Generally, a codec with low bandwidth consumption and high voice quality is good.
How Good Is The Call Quality?
  • Technology advances make Internet calling as good as or better than normal PSTN connections, especially with high-speed broadband. Dial-up services may have lower quality.
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