Here's my cheat sheet:
SPRE Function 500 Set (if applicable)
1 Activate Ring Again
2 Cancel Ring Again
3 Group Ringing Number Pickup
4 Trunk Answer From any Station (TAWAS)
5 Charge Account Number
6 Authorization Code Entry
70 Trunk Verification Access
71 Call Park
72 Call Park Retrieve
73 Dial System Speed Call
74 Call Forward
75 System Speed Call List Access 500 Sets dial #2
76 User Speed Call List Access 500 Sets dial #3
77 Permanent Hold 500 Sets dial #4
78 Store Number
79 Recall Stored Number
80 Priority AUTOVON
81 Automatic Set Relocation
82 Flash Override AUTOVON
83 Malicious Call Trace
84 IS Access
84 User Status
85 Flash AUTOVON
86 Room Status
87 Disconnect AO6 Party
88 Immediate AUTOVON
89 Last Number Redial
91 Maintenance Set Login
92 Terminal Diagnostics - Used with LD 31
93 Invoke Conference Test - Used with LD 88
94 Group Ringing Number Pickup - Other Group
95 DN Pickup
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Fletch
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