I worked in development in Santa Clara, CA during the days of the 9751. Yes, it was a beautiful telephone system, especially 9005.2. We were shocked and saddened to see it die. But wait. That technology lives on inside the UK's "Realitis", also known as the HiPath DX!!!! Amazing.
Yes, I know all that AMO stuff sounds crazy, but it takes time to master it. Ever tried to drink a shot of Scotch Whiskey? Tastes like horse dung and rocket fuel mixed together in hell...the first time. Now I like it. Get yourself back into training. There are training centers in Texas, the UK (Nottingham), Belgium, South Africa, Brazil, etc - ready to help you learn.
For now, you WILL struggle, make mistakes, piss off everybody, but it is the learning process. Everybody goes thru this phase. Feel free to ask specific questions and I will try to respond.
Regarding your "4357": There is an AMO that defines the existence of the Hunt Group. The AMO command to display ALL Hunt Groups is: DIS-SA;
But since you say that "4357" is "Reserved", this means that someone assigned "4357" to be a Hunt Group "pilot number" in the Dial Plan (AMO WABE), but then either never completed the transaction by performing "ADD-SA", or possibly deleted the Hunt Group, but never deleted the Hunt Group pilot number from the dial plan.
To see if "4357" exists in AMO WABE (the Dial Plan), type "DIS-WABE:TYPE=GEN,CD=4357;"
Here you will probably see that "4357" has been assigned a Digit Analysis Result (DAR) of "HUNT". This means that the system's code will interpret this number, when dialed, as a HUNT GROUP 'pilot number", which means that dialing "4357" will distribute your call to a select set of stations - all of which are configured in AMO SA.
Since the "4357" Hunt Group no doubt does not exist, try typing "DEL-WABE:TYPE=CD,CD=4357,DAR=HUNT;" This command should remove ONLY "4357" from the Dial Plan.
DO NOT EXPERIMENT with DEL-WABE, as you can delete the entire dial plan by typing DEL-WABE:TYPE=DPLN...... I repeat, do NOT type that!!!!!
Now to add "4357" as a Station, type: ADD-WABE:CD=4357,DAR=STN;
Now you must build the station record, using either AMO SCSU if this is an Analog station, or AMO SBCSU if this is to be a Digital or IP station.
The easiest way to accomplish this feat is to REGEN an existing station - which means to use a similar station as sort of a Template.
Try "REG-SBCSU:<enter your template station number>;" <this will REGEN a digital station; remember to use REG-SCSU if you are working with an Analog station>
The result will be the complete AMO necessary to build the station record for the station number that you are attempting to use as a template.
Now you need to modify the template with your desired station number and Physical Equipment Number (PEN - the hardware that is going to support your board, e.g.SLMO). Place your mouse cursor anywhere in the BLACK REG-SBCSU command, and press your ENTER key. This should transfer the REGENed command into the buffer area (bottom of the Expert Access window), where you can modify the command to include your NEW station number "4357" and a New Physical Equipment Number (PEN). So if you had selected station number 4444 as your template, and its PEN was 1-1-10-5, you must change the "4444" to "4357", and change the "1-1-10-5" to an available PEN. When you think you are done, press ENTER to submit your entry, and hopefully it works!
If you need to know which PEN(s) are available, visually locate the shelf and slot containing the correct type of PCB (Printed Circuit Board), such as the SLMO, which supports Optisets and OptiPoint 500 phones (example only). Or if you are familiar with AMO BCSU "Table" view, you can use it instead of visually locating the correct board. If you locate the desired board as shelf number "2", Slot "5", then the command to find an available PEN is: DIS-SDSU:NOGEN,,PEN,PER3,1,2,5;
Let me know if this helps. Good luck. You may run in to me some day!