How do you adjust the number of rings?

What type of phone is this? Most home phones have a setting in them to adjust the number of rings. Retrieving voice mails requires the voice mail be set up first. To assist you further, please provide more details.

For all of you that want a real answer here ya go. This isn't something you can change on your phone this has to be changed with your service provider. If you are with AT&T, like I am, then this is the solution for you (link of where I found it below as well). 1. enter *#61*11# and press send/talk on your phone.
2. write down the number your calls are currently forwarded to (usually +1401#######, but not always). this is your voicemail deposit number.
3. decide how long you want the phone to ring in 5 second intervals. the maximum time is 30 seconds. i'd recommend 25 seconds or less, as using 30 may cause you to be billed for a minute of airtime each time someone is forwarded to voicemail.
4. now enter **61*[number from step 2]*11*[number from step 3, use 2 digits]# and press send/talk.

example
voicemail deposit number is +14015551212
you want it to ring for 20 seconds
you would enter **61*+14015551212*11*20# and press send/talk.

if you have trouble with the above procedure, you can always call customer care at 800-331-0500 to change it.
OR QUESTION: How can I adjust the number of times my wireless phone will ring before the caller goes to voicemail? ANSWER: Contact Customer Care at 1-800-331-0500 or dial 611 from your wireless phone to change the amount of time your phone will ring before going to voice mail. The adjustments made by Customer Care are based on the traditional ring heard by the caller, not the unique Ringtone you hear from your phone. I just wanted to add that increasing the ring length to 30 seconds will not cause you to be charged a minute should the caller go to voicemail. This was confirmed by an AT&T technician.
http://forums.att.com/t5/Voice-Mail/Increase-the-number-of-rings-before-a-call-goes-to-the-voicemail/td-p/2576651

When it stops ringing, the caller goes to your voice mail, right?

If so, then you need to contact your phone company and have them change your "Ring Cycle" -- that's the number of rings before the voice mail system picks up.

Some phone companies have a way for you to do this yourself from their website, other require that you call up the customer service line. Either way, the thing you want to adjust is your voice mail ring cycle.

When it stops ringing, the caller goes to your voice mail, right?

If so, then you need to contact your phone company and have them change your "Ring Cycle" -- that's the number of rings before the voice mail system picks up.

Some phone companies have a way for you to do this yourself from their website, other require that you call up the customer service line. Either way, the thing you want to adjust is your voice mail ring cycle.

ask your local admin to remove your phone from coverage path

First, call your voice mail. After the messages you will be given a menu to follow. On the Sony Ericsson W350 I went to Personal Options (4) then to Administrative Options (2) and finally Prompt Level (3). After reaching Prompt Level you have the option to shorten or extend the number of rings. At this point I chose to shorten the prompt and then I exitted the system.

Depending on your system and configuration, that timer could be in any number of locations, and most of them are only available to a certified dealer.

We have a support package that allows us to make all the changes you need over the Internet for a flat annual fee. If you want your whole system to work properly and all changes to be made for you at a flat budget, call us at 877-236-8376.

If you would go to your phone and dial intcorm #6041 plus thevoice maik extension number than enter time in 20 for exemple is 5 ring before going to voice mail than hang up.

In Coverage path form for voice mail

COVERAGE CRITERIA
Don't Answer? y y Number of Rings: 2
COVERAGE POINTS
Point1: h2 Rng: 1

you can change Number of rings,Rng options
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press *94, then press the number of rings you want 1-9. The tone will change and thats it.