I can't turn on the ringer on my AT&T BIS-10 Merlin phone. My line blinks green when a call is incoming and I have to pick up and press the button in order to receive the call. I need the phone to ring and answer when I pick up the receiver.

WOW! Oldie.
ACCESSING MEMORY ALPHA!!!!!!!!!!
There is a switch on the left side. it will be in the center. 1 way checks all the lamps and ringer. The other way is programming mode. Put it in program mode than press the line key you want to change. it will toggle through
Dark=no ring
flash=delayed ring
solid=immediate ring
center the switch
DONE.

It should have a slider on one of the sides. Set it to "low" or "off"

It depends on how the control unit is programmed. The BIS 10 can't be used as a stand-alone phone (as in....you can't connect it directly to a telephone line).

The BIS 10 will work with the following systems:

AT&T Merlin 206
AT&T Merlin 410
AT&T Merlin 820
AT&T Merlin 820D2
AT&T Merlin 1030
AT&T Merlin 3070
AT&T Merlin II (with the proper modules installed)
AT&T Merlin Legend (with the proper modules installed)

No.

The BIS 10 and related telephone units need to be connected to one of the following AT&T Merlin telephone systems:

AT&T Merlin 206
AT&T Merlin 410
AT&T Merlin 820
AT&T Merlin 820D2
AT&T Merlin 1030
AT&T Merlin 3070
AT&T Merlin II (With the proper modules installed)
AT&T Merlin Legend (With the proper modules installed)

By the part number. BIS means Built-In-Speakerphone. So a BIS has a mic. Try the right side front.

Carl

If you have a "squared" system (each line assigned to a different button), just press a different line button. To change the order of the lines, slide the "T/P" switch to "P" and press the line buttons in the order you want to use them (ie: Line 4, Line 3, Line 2, Line 1).

If your lines are "pooled" you just get the next available line from the pool - no choosing which line you get.

Hope this helps.

Enter admin mode:
Slide switch on left (T/P) down to the "P" position.
press the intercom button above TRANSFER
dial the 2 digit extension number you want to modify
Touch the buttons to add/remove the lines.
Green light on means line is active
Green light off means line is not active

Yes, Plantronics sells a myriadof different headsets that should work well with Merlin sets.

Unfortunately no. The merlin 410 was an early phone system that didn't have much in the way of programming.

At the phone slide the T/P switch to "P"

Press ** (star,star)
press the linjes in the order you want to pick them up.
Press ** (star,star)
Slide T/P switch to "T"