Classic Rotary Phones Forum

Telephone Switching => Intercom & Interphone Systems => Topic started by: Babybearjs on June 02, 2014, 06:51:10 PM

Title: melco MC-9 manual sought.
Post by: Babybearjs on June 02, 2014, 06:51:10 PM
does anyone have a copy of the Melco MC-9 9 station ICM module manual available? making the connections is pretty easy except for terminal: "PC" and "AUD SUP" I'm not sure what these are for.... 
Title: ~
Post by: poplar1 on June 02, 2014, 08:35:31 PM
AUD SUP is for whichever ringing source you are using for your intercom: 10 Volts AC for the newer buzzers, 18 VAC for the old Edwards Buzzers, or 90VAC for ringers...

PC? I don't recall that one.


20B2:
A Battery: 24 VDC filtered (Talk path on intercom)
B Battery: 24 VDC unfiltered (for the line/hold relays or line cards)
10VAC: buzzers (intercom or common audible for outside lines)
18VAC: buzzers     "          "      "            "         "       "        "
90VAC: ringers      "          "      "            "         "       "         "

Title: Re: melco MC-9 manual sought.
Post by: poplar1 on June 02, 2014, 08:44:52 PM
PC may be paging contact--you would dial one of the intercom codes and then be connected to the overhead paging system. I thought it was called something else.

BTW "AUD SUP" = AUDIBLE SUPPLY
Title: Re: melco MC-9 manual sought.
Post by: Babybearjs on June 03, 2014, 04:17:42 AM
thank you!
Title: Re: melco MC-9 manual sought.
Post by: payphone2830 on January 01, 2019, 02:46:12 AM
Not sure if you still need one or not but I do have a copy, if you need one just PM me.
Title: Re: melco MC-9 manual sought.
Post by: Babybearjs on January 03, 2019, 12:44:59 AM
the MC-9 was bad, so its gone now.
Title: Re: melco MC-9 manual sought.
Post by: Key2871 on January 03, 2019, 08:13:56 AM
Out of all the units I ever came across, melco was at the top for dead ones. Valcom was the most forgiving and long lasting.