Here is the full log entry.....
49874mS PRN: Outgoing Setup Processing
49874mS PRN: Choose outgoing channel 22
49875mS PRN: TNS= sss=00000000 service=00
49875mS PRN: Setting configured voice gain for ch 22.
49892mS ISDNL3Evt: v=5 stacknum=5 State, new=Initiated, old=NullState id=1578
49892mS ISDNL3Tx: v=5 peb=5
ISDN Layer3 Pcol=08(Q931) Reflen=2 ref=0007(Remote)
Message Type = Setup
InformationElement = BearerCapability
0000 04 03 80 90 a2 .....
InformationElement = CHI
0000 18 03 a9 83 96 .....
InformationElement = CallingPartyNumber
0000 6c 0c 21 80 36 33 31 38 37 38 30 31 36 32 l.!.**internal number**
InformationElement = CalledPartyNumber
0000 70 08 80 33 39 34 39 33 31 37 p..**destination number**
49892mS ISDNL2Tx: v=5 peb=5
0000 00 01 4a ea 08 02 00 07 05 04 03 80 90 a2 18 03 ..J.............
0010 a9 83 96 6c 0c 21 80 36 33 31 38 37 38 30 31 36 ...l.!.**internal number**
0020 32 70 08 80 33 39 34 39 33 31 37 p..**destination number**
49894mS ISDNL1Tx: v=5 peb=5
0000 00 01 4a ea 08 02 00 07 05 04 03 80 90 a2 18 03 ..J.............
0010 a9 83 96 6c 0c 21 80 36 33 31 38 37 38 30 31 36 ...l.!.**internal number**
0020 32 70 08 80 33 39 34 39 33 31 37 p..**destination number**
49902mS ISDNL1Rx: v=5 peb=5
0000 00 01 01 4c ...L
49918mS ISDNL1Rx: v=5 peb=5
0000 02 01 ea 4c 08 02 80 07 02 18 03 a9 83 96 ...L..........
49918mS ISDNL3Rx: v=5 peb=5
ISDN Layer3 Pcol=08(Q931) Reflen=2 ref=0007(Local)
Message Type = CallProceeding
InformationElement = CHI
0000 18 03 a9 83 96 .....
49918mS ISDNL3Evt: v=5 stacknum=5 State, new=Proceeding, old=Initiated id=1578
49919mS ISDNL2Tx: v=5 peb=5
0000 02 01 01 ec ....
49920mS ISDNL1Tx: v=5 peb=5
0000 02 01 01 ec ....
49927mS CMCallPkt: v=1577
CMProceeding
Line: type=Q931Line 5
Call: lid=0 id=1578 in=0
BChan: slot=0 chan=23
Product Unknown
49937mS ISDNL1Rx: v=5 peb=5
0000 02 01 ec 4c 08 02 80 07 45 08 02 82 95 ...L....E....
49937mS ISDNL3Rx: v=5 peb=5
ISDN Layer3 Pcol=08(Q931) Reflen=2 ref=0007(Local)
Message Type = Disconnect
InformationElement = CAUSE
0000 08 02 82 95 ....
49937mS ISDNL3Evt: v=5 stacknum=5 State, new=ReleaseReq, old=Proceeding id=1578
49938mS ISDNL3Tx: v=5 peb=5
ISDN Layer3 Pcol=08(Q931) Reflen=2 ref=0007(Remote)
Message Type = Release
49938mS ISDNL2Tx: v=5 peb=5
0000 00 01 4c ee 08 02 00 07 4d ..L.....M
49939mS ISDNL1Tx: v=5 peb=5
0000 00 01 4c ee 08 02 00 07 4d ..L.....M
49944mS ISDNL1Rx: v=5 peb=5
0000 00 01 01 4e ...N
49956mS ISDNL1Rx: v=5 peb=5
0000 02 01 ee 4e 08 02 80 07 5a ...N....Z
49956mS ISDNL3Rx: v=5 peb=5
ISDN Layer3 Pcol=08(Q931) Reflen=2 ref=0007(Local)
Message Type = ReleaseComplete
49956mS ISDNL3Evt: v=5 stacknum=5 State, new=NullState, old=ReleaseReq id=1578
49957mS ISDNL2Tx: v=5 peb=5
0000 02 01 01 f0 ....
49958mS ISDNL1Tx: v=5 peb=5
0000 02 01 01 f0 ....
49964mS PRN: call->mobile_twin_line == this - 0
49964mS PRN: call->off_switch_bchan.slot - 00000000
49965mS PRN: msg.bchan.slot - 00000000
49965mS PRN: call->off_switch_bchan.chan - 00000000
49965mS PRN: msg.bchan.chan - 00000017
49965mS PRN: is_quick_answer_on_master - 0
49965mS PRN: call->Bstate - 8
49966mS PRN: call->Bend != this - 0
49966mS PRN: msg.cause - 21
49966mS CMCallPkt: v=1577
CMReleaseComp
Line: type=Q931Line 5
Call: lid=0 id=1578 in=0
BChan: slot=0 chan=23
Product Unknown
Cause=21, Call rejected
49967mS CDR: Update CDR Condition Code for call ffcbd1a4, ConditionCode='F' (cause=CMCauseCallRejected), conf=00000000 [primary call=00000000]