Quality of the audio tone on the base is fuzzy

First, turn on the Answering system, either with the base Answer On/Off button or the handset (Ans. Setup, Ans. On/Off). Next make sure that the memory isn't full. If the message LED reads FL, delete old messages with the handset. You'll need to press the button with the envelope/Mute on it to access the message.

Now, press Menu/Select, scroll through the menu to Ans. Setup. Select this and search for Record Time. Select this and choose the recording time of 1 or 4 minutes. Press Menu/Select again to save the setting.

This is in the manual on page 45. You can get the manual from Uniden at https://www.uniden.com/product-information/owners-manuals . Search for the DECT1580 (the last 5 indicates the number of handsets). The direct link to the manual is https://www.uniden.com/File%20Library/FooterNav/Product%20Information/Owners%20Manuals/DECT1580om.pdf .

I hope this helps.

Cindy Wells

Press [menu/set] on the base.
Press [select/-] to move the pointer to select DIAL MODE, and
then press [menu/set].
Press [select/+] or [select/-] to select TONE or PULSE
(the initial setting is TONE).
Press [menu/set]. You will hear a confirmation tone.

If you need a manual, you can download a copy here. The instructions above are from page 14.

Resetting the voice message waiting indicator
When you receive a new voice mail message, the new message LED on the top of the handset flashes. In the event your message waiting light gets out of sync with your phone company's
voice messaging system, you can manually reset it back to the "No messages waiting" state.
1. Press and hold FiND on the base for five seconds.
Note: The handsets connected to the base will start to beep, however, keep pressing for five seconds.
2. A beep sounds and the message alert tone is reset.
Changing the dial mode
Your phone can communicate with the telephone network in two different ways: tone dialing or pulse dialing. These days, most base networks use a method called tone dialing, so your phone comes programmed for tone dialing. If your phone company uses pulse dialing, you will need to change your phone's dial mode. If you don't get a dial tone or can't connect to the telephone network, please follow the steps below to modify your phone's settings:
1. Press MENU/SELECT.
2. Select the Global Setup menu, and then the Dial Mode submenu.
3. Scroll to highlight Pulse.
4. Press MENU/SELECT. You will hear a confirmation tone.
If you ever need to change the dial mode back to tone dialing, follow the same procedure, but select Tone in step 3.

Finally for future ease of use, here is a link to the user manual were I copied the above information from:

http://www.uniden.com/content/ebiz/uniden/resources/ownersmanuals/DECT1580-3om.pdf

Activating Personal Ring
You can assign special ringer tones to anyone in your phonebook. When your phone gets a call, it looks up the Caller ID information in your phonebook. If you've assigned a personal ringer to that number, the phone uses it so you know who is calling. To turn the personal ringing on or off, follow these steps:

1. Press [Menu/Select]. Select the HANDSET SETUP menu, and then the PERSONAL RING submenu.
2. Move the cursor to select ON or OFF.
3. Press [Menu/Select]. You will hear a confirmation tone.

Selecting a Ring Tone (Handset only)
You may choose from four melodies or three tones for your phone's primary ring tone. Each handset can use a different ring tone or melody. The available ring tones are as listed:

1. Press [Menu/Select]. Select the HANDSET SETUP menu, and then the RINGER TONES submenu.
2. Move the cursor to select a ring tone. As each ring tone is highlighted, you will hear a sample.
3. When you hear the tone you want to use, press [Menu/Select]. You will hear a confirmation tone.

Adjusting the Speaker Volume
Handset Speakerphone: You can choose from six volume levels for the handset speakerphone. To adjust the speaker volume while on a speakerphone call, press the UP Arrow button (to make it louder) or the Down Arrow button (to make it softer).
Base Speaker: You can choose from ten volume levels for the base speaker. To adjust the speaker volume while call screening or playing messages, press [volume +] (to make it louder) or [volume -] (to make it softer).

Adjusting the Audio Tone
If you aren't satisfied with the audio quality of your phone, you can adjust the Audio Tone of the earpiece while on a call. Your phone gives you three audio tone options: low, natural and high; the default setting, Natural Tone, is recommended for hearing aid users. Audio tone adjustments only apply to the earpiece, not the speakerphone.
To adjust the audio tone:

1. While on a call, press [Menu/Select].
2. Move the cursor to select AUDIO TONE, and then press [Menu/Select].
3. Move the cursor to select desired option (HIGH TONE, NATURAL TONE, or LOW TONE), and then press [Menu/Select]. Selected option appears in the display for two seconds, and then the display returns to normal.

Deleting Phonebook Entries
You can delete a single phonebook entry at a time or all phonebook entries at once:
To delete a single phonebook entry:

1. When the phone is in standby, press the phonebook key.
2. Find the entry that you want to delete and press [Menu/Select].
3. Select DELETE. DELETE ENTRY? appears in the display.
4. Move the cursor to select YES.
5. Press [Menu/Select]. You will hear a confirmation tone, and DELETED! appears in the display.

Deleting Caller ID Numbers

1. To delete only one Caller ID number, press the Caller ID button when the phone is in standby, and then find the number you want to delete.
2. Press [Menu/Select] and select DELETE ENTRY.
3. When the phone asks you to confirm, select YES.

1. To delete all the Caller ID numbers, press the Caller ID button when the phone is in standby, and then press [Menu/Select].
2. When the phone asks you to confirm, select YES.

Note: When you delete a Caller ID number, you delete it permanently.

Deleting a Redial Record
If you want to delete a phone number from the handset's redial list, follow the steps below:

1. When the phone is in standby, press [Redial/Pause].
2. Use the UP Arrow button and the Down Arrow button to scroll through the redial list.
3. When you find the redial number you want to delete, press [Menu/Select] and select DELETE ENTRY.
4. When the phone asks you to confirm, select YES. The redial number is deleted.

Resetting the Voice Message Waiting Indicator

1. When you receive a new voice mail message, the new message LED on the top of the handset flashes and VM appears in the handset display.
2. In the event your message alert tone gets out of sync with your phone company's voice messaging system, you can reset back to its original "no messages waiting" state.
3. To reset, press and hold [find hs] on the base for five seconds.
4. A beep sounds and the message alert tone is reset.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Hi Ken.

Here the manual for Presidian 43 series.

Regards.

Ginko.

Hi,

Follow the below instruction to change to pulse mode

Press MENU/SELECT.

Select the Global Setup menu, and then the Dial Mode sub menu.

Scroll to highlight Pulse.

Press MENU/SELECT. You will hear a confirmation tone.

Now the mode is selected to pulse mode


Thank You

It was easy for my Emerson Dect 6.0 to be switched either rotary / pulse by just pressing the "FLASH" button for 3 seconds until it beeped. Problem solved.

Or if that doesn't work, you have to:

Tone/Pulse
You can switch the dial mode. In most situations the TONE option should be selected.

• Press the MENU button. Select BASE using <FLASH - or - CID> and press the MENU button again.

• Using <FLASH - or - CID> select DIAL MODE and press the MENU button.

• Using <FLASH - or - CID> select TONE or PULSE and press the MENU button.

OR

Press and HOLD the "<FLASH" button for approximately 3 seconds. T (Tone) or P (Pulse) appears in the display.

Weak or Hard to Hear Audio (From the Uniden Manual)
If the caller’s voice sounds weak or soft, the signal might be blocked by large metal objects or walls; you might also
be too far from the base, or the handset’s battery may be weak.

1. Try adjusting the volume of the earpiece (see page 36) or the audio tone
2. Try moving around while you’re on a call or moving closer to the base to see if the sound gets louder.
3. Make sure the handset’s battery is fully charged.

Per the manual, If there is a musical note in the display with a slash thru it, you have turned off the ringer. You have done this by pressing and holding the # button.
If you have the manual it's on the bottom of page 20 and continues on 21.
If not follow these steps.

Press Menu
Press CID/PBK (Personal set)
Press Menu (Handset Tone)
Press Menu (Ring Tone)
Press Menu and then CID/PBK to select the volume you want
Press Menu (Save Setting)

click this link to get the manual

http://www.p4c.philips.com/files/c/cd4452b_37/cd4452b_37_dfu_aen.pdf

Base unit ringer tone
(use either the handset or the base unit)
Make sure the base unit is not being used.
Setting the base unit ringer tone by using the
4 Select the desired ringer tone by pressing [d]
or [B].
• The handset will ring and the ringer tone will
change. If the ringer volume has been turned off,
the handset will not ring
• You can also select the ringer tone by pressing [1]
to [7].
5 Press Save, then press [OFF].
Press VOLUME [<] or [>], then select the desired ringer tone by pressing
[1] to [7].
[1] to [3] : Bell ringer patterns [4] to [7] : Melody patterns
• After pressing VOLUME [<] or [>], the base unit will ring using the current ringer
tone.
• The base unit will ring and the ringer tone will change.
• To stop ringing, press [STOP].
1 Press [MENU].
2 Scroll to “Initial setting” by pressing [d] or [B], then press
Select.
3 Scroll to “Set base unit” by pressing [d] or [B], then press Select.
4 Press Select at “Ringer tone”.
5 Select the desired ringer tone by pressing [d] or [B].
• The base unit will ring and the ringer tone will change. If the base unit ringer
volume has been turned off, the base unit will not ring
• You can also select the ringer tone by pressing [1] to [7].
6 Press Save, then press [OFF].

This Can Be Found On Page 17 And 18 Of The User Guide.

If You Do Not Have The User Guide It Can Be Downloaded Here
http://support.radioshack.com/support_phones/doc73/73355.pdf

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