Thanks derfloh. That sounds pretty promising, but I am not sure it will work. I can't seem to see an associated short code here (although I do not yet have an eye for the monitor output yet). Anyway here is a small portion of the log that I believe contains the function of the visual voicemail button. To me it looks to be dialing into the user extension without a shortcode. Looking like it may be impossible. Either way thanks for the info. I think the 't' character may be useful in the future.
08:22:45 1880159804mS CMExtnEvt: v=(null) State, new=Idle old=Idle,0,0,5432: Feature Key Pressed 7

CPLFeatureMessages
08:22:45 1880159960mS H323Evt: Recv: RegistrationRequest 10.1.7.27; Extn(3227), time since last RRQ-KA 55010, Endpoints registered: 60; Endpoints in registration: 0
08:22:46 1880160654mS H323Evt: Recv: RegistrationRequest 10.1.7.42; Extn(5302), time since last RRQ-KA 100015, Endpoints registered: 60; Endpoints in registration: 0
08:22:47 1880161873mS H323Evt: Recv: RegistrationRequest 10.1.7.26; Extn(3219), time since last RRQ-KA 55011, Endpoints registered: 60; Endpoints in registration: 0
08:22:47 1880161892mS CMExtnEvt: v=(null) State, new=Idle old=Idle,0,0,5432: Menu Key Pressed 11:H
08:22:47 1880161892mS CMCallEvt: 0000000000000000 0.48230.0 -1 BaseEP: NEW CMEndpoint f4cffdb8 TOTAL NOW=5 CALL_LIST=2
08:22:47 1880161893mS CMCallEvt: 0000000000000000 0.48230.0 -1 Joe Hays.-1: NEW CMExtnEndpoint f4cffdb8, Name=Joe Hays, Extn=5432, Phys Extn=5432
08:22:47 1880161893mS CMCallEvt: CREATE CALL:14275 (f189453c)
08:22:47 1880161894mS CMCallEvt: 0000000000000000 0.48231.0 -1 BaseEP: NEW CMEndpoint f4d23608 TOTAL NOW=6 CALL_LIST=2
08:22:47 1880161895mS CMExtnEvt: Joe Hays: CMExtnHandler::SetCurrent( id: 0->48230 )
08:22:47 1880161896mS CMExtnRx: v=5432, p1=0
CMSetup
Line: type=IPLine 250 Call: lid=314 id=48230 in=0
Called[?Joe Hays] Type=Voicemail (102) Reason=CMDRdirect Called SubAddress[oink] Calling[5432] Type=Internal Plan=Default
BC: CMTC=Speech CMTM=Circuit CMTR=64 CMST=Default CMU1=ULaw
IE CMIEFastStartInfoData (6) 12 item(s)
IE CMIECallingPartyName (110)(Type=CMNameDefault) name=Joe Hays
IE CMIECallingPartyKName (226)(Type=CMNameDefault) name=Joe Hays
08:22:47 1880161896mS CMCallEvt: c0a82a010000bc66 314.48230.0 14275 Joe Hays.0: StateChange: END=A CMCSIdle->CMCSDialInitiated
08:22:47 1880161896mS CMExtnEvt: v=181 State, new=Dialling old=Idle,0,0,Joe Hays