Manual for DPH-541

Manual for DPH-541

Brand: D-Link

Category: Networking

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 9:13 p.m.

Manual Publish Date: 2006-06-13

Warranty Information

D-Link warrants the hardware portion of the product for one year and software for ninety days.

  • Switching the Phone On or Off: Press and hold the Power key to turn the phone ON or OFF.
  • Power Saving Mode: The LCD monitor turns dark after 15 seconds of inactivity to save power. Press any key to wake it up.
  • Adjusting the Volume: Use the volume adjustment keys (Up or Down) to increase or decrease the volume. The volume level is indicated on the screen.
  • Making a Call: In Standby, dial a number and press SEND, or press Menu, then Select to view the Phonebook, select a contact, and press SEND.
  • Answering a Call: Press SEND to accept and pick up the phone call, or press PWR END to reject the incoming call.
  • Using the Key Lock Feature: Press and hold the # key to lock/unlock the keypad. Alternatively, navigate to Settings > Keypad > Keypad Lock.

Troubleshooting and error codes

Issue Possible Solutions
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? As which codec choice is depending on what codec is supported on both end of the VoIP host. Generally a codec with low bandwidth consumption and high voice quality is a good codec.
How Good Is The Call Quality? Technology advances in IP telephony transportation have made Internet calling as good as or better than normal PSTN connections. This is mostly effective for high speed Broadband connections, whereas dial up services have some way to go before delivering the quality of PSTN calling.
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