VTECH VT-2406 TONE- PULSE SETTING ?

Well, cannot find ia5862...but from ia5863 which must be similar; Manual at http://www.scribd.com/doc/64707312/Vtech-Phone-Ia5863-Manual-r2, it says... Set the dial mode
If you have touch tone service, the phone is ready to use as soon as the battery is charged. If you have pulse (rotary) service, you'll need to change the dial modee• Press
PROG.
• Press o runtil the screen displays
DIAL MODE:
and the current settings• Press
SELECT.
The current setting blinks • Press or to select
TONE
or
PULSE.
• Press
SELECT
to save

Hope it helps, sounds like the phone should ALREADY be on tone dial out of the box.

Since you declined to specify the model of your VTech 5.8GHz phone, I can only suggest that you enter it into the search box here to download a copy of the manual. The manual will describe how to switch between pulse and tone dialing.

There's a TONE/PULSE switch on the bottom of the unit. Switch it to TONE.
If you need one, you can download a copy of the VT2461 manual here.

There's a tone/pulse switch on the bottom of the base unit. If you need a manual, you can download one at
http://vt.vtp-media.com/ecp/documents/product_Product/1249/UserManual/2839/vt2461_manual.pdf


http://vt.vtp-media.com/ecp/documents/product_Product/
1249/UserManual/2839/vt2461_manual.pdf

There's a switch on the bottom of the base unit to switch between tone and pulse. It's marked "18" in the illustration on page 6 of the manual at
http://vt.vtp-media.com/ecp/documents/product_Product/1249/UserManual/2839/vt2461_manual.pdf

Hello there,

Please click on the link below to download the user manual.

Good luck!

http://vt.vtp-media.com/ecp/documents/product_Product/55/UserManual/106/CS5121_Manual.pdf

Here are the instructions for one vtech phone (may not be quite the same as yours but may work or give enough hints for you to figure it out):
Press PROG.•
Press ? or ? until the screen displays DIAL MODE: and the current setting.
Press SELECT. The current setting blinks.
Press ? or ? to select TONE or PULSE.
Press SELECT to save.

To switch back to tone dialing, hold down the SELECT button for couple of seconds. The display on the base unit will read PU indicating pulse dialing. Now press and hold SELECT to change it to TN (Tone dialing).