Vintage Trimline 4wire verses 5wire handset cords

[princessphone]

Hi there,
Have an issue again. Bought a very nice blue rotary Trimline wall phone, early seventies. It has a 4 wire vintage long handset cord which is a bit beat up and it works fine. I replaced it with a very nice short 5 wire cord, however it wont allow me to dial out. I'm a bit confused with the extra white wire and the relocation of the yellow wire. Can someone help me to fix this issue and also explain why WE went from a 5 wire cord to a 4 wire cord? Any comments would be much appreciated.
John DeJonge     

[poplar1]

Just disconnect the blue ringer lead from B terminal:



          If it is necessary to use an H5AA cord
          for other than tip party identification
          service, disconnect the (BL) ringer lead
          from B terminal on the terminal board
          in the base, insulate and store.
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5-conductor handset cord was needed only for tip party identification (H5AA cord)(for correct billing on certain party lines) or Message Waiting Lamp (H5AD)(as in hotels).

Reference: BSP Section 502-320-100, Issue 5, Oct. 1968 in South Central Bell Installer-Repairman Handbook, Oct. 1969

[princessphone]

Thank you again poplar1.
She now works just fine.
John DeJonge