I accidentally hit *2323 on a live line and logged our Hunt Group to Busy, does anyone know how to UNDO this???

Try 751 as the code. You can also try unplugging the main control box at the end of the workday for 10 minutes and plug it back in. This might remove temporary programming.

NEC DT400 Phone Manual

Rhode Island Telephone https://www.ritelephone.com > uploads > 2019/07
To Program a Line key as a Programmable Function. Key: 1. Press the Speaker key. 2. Dial Service Code 751. 3. Press the Line Key to be programmed.
72 pages

I have never heard of this 'hunt group' feature before.

https://www.google.com/search?q=nec+dt400+programming+guide

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You have to have the numbers set up as a "hunt group".The real telco companies can do this,but not sure about VOIP numbers or CATV co dial tones.The primary number on a hunt group will forward the calls to the next # in the hunt group(in your case there are only 2 numbers).You can get many numbers set up this way.

Hunt group buttons are just like lines, they occupy to first buttons on the phone. The only way to move a hunt group button is up or down the list of lines. If you want it first, you have to remove all assigned line from the extension to be changed this includes the hunt group. Now come out of programming and go back in to the extension. Add the lines or hunt group in the order you want them. NOTE IF THE LINES ARE TO BE OUT OF ORDER NUMERICALLY, YOU HAVE TO ADD THE ONES THAT ARE IN ORDER AND LEAVE PROGAMMING AND COME BACK IN AGAIN. THIS SETS THE ORDER OF APPEARANCE.

If you lost programming, you should have seen something on Ext 10 or 11 saying that the batteries were low and to change them.

Without having the programming manual on hand for this switch I have to generalize from other switches. Double check your auto forward settings within your hunt groups. It sounds like you have auto forward set wrong. If you have the voice mail set to engage on the 4th ring try changing that to engage on the 6th ring with the forward within a hunt group to forward to next available on the 3rd ring, see if that helps.

Hunt groups are set up by the service provider and not related to the phone system. In a 3 or 4 line hunt group, you're given a pilot number and 2 or 3 other lines. In some exchanges, you can dial any of the numbers and they will hunt to the rest of the numbers in the group....it's very rare. Instead, you must always dial the pilot number and each line is tested, with the first idle line being rung.

If your callers are getting a busy when the first line is busy and the other lines are idle, call the phone company and discuss your telephone plan. Tell them your lines won't hunt and they'll tell you why or fix it.

Carl

Not too sure if you really need that dial 0 point, since the calls are already ringing in on the receptionist desk.

You can create changes and make a hunt group, with an over flow with another hunt group, which will rings specific people, and if there is no answer the over flow can go to a voicemail or auto attendant... more programming than I would like to type.

Simple solution: Make sure that everyone that you want to answer the calls, they are in the same pick up group.

Then if the people that you want to answer hears the phone ringing, they just have to dial Feature 75, this is group pickup.

To find out if the people are in the same pick up group:
-> go into the system programming
-> TERMINALS&SETS and enter the extension
-> find CAPABILITIES and enter
-> hit next till you find Pickup grp: this will have a number and ensure that all the sets you want have this same number.
-> rls to back out of programming.

This way anyone that hears the phone ringing can answer anytime they want.

Roll over or hunt group is handled by carrier

dial out of the hunt group on the 2nd phone:
TO LOG OUT OF THE HUNT GROUP:

* 7360 *

TO LOG INTO THE HUNT GROUP:

* 7361 *

Need to login in system and program buttons from there.