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redder · June 8th, 2004, 01:09 PM

the operating and repair procedures were for a 550/551 switchboard
step by step is
the 51A lamp was used for
the options for a 400D were and how we loved the 400G's
the features on a D400 FP 2 were

June 8th, 2004, 01:09 PM	#3 (permalink)
redder PBXtech SILVER 25+ posts Join Date: Feb 2004 Posts: 26	Re: You might be an old phone guy if you know what... the operating and repair procedures were for a 550/551 switchboard step by step is the 51A lamp was used for the options for a 400D were and how we loved the 400G's the features on a D400 FP 2 were