yes there is a password on each extension.
here is a snippet of the monitor, im not too familiar with monitor or how to read it/ what it all means, this seems to be at the point of customer unplugging a phone and it becoming "stuck" as unregistered, only becoming logged in / usable after a quick name change..
428197530mS RasTx: v=Src=192.168.42.1:1719, Dst=192.168.42.20:49300 peb=0
RasMessage = gatekeeperConfirm
428197620mS RasRx: v=IFace=LAN1, Src=192.168.42.254:58842, Dst=192.168.42.1:1719 peb=0
RasMessage = registrationRequest
428197620mS H323Evt: Recv: RegistrationRequest 192.168.42.254:58842 on 0; Endpoints registered: 42; Endpoints in registration: 0, tpkt user: 00000000
428197621mS H323Evt: e_H225_AliasAddress_dialedDigits alias
428197621mS H323Evt: found number <501>
428197621mS H323Evt: RRQ --- CallSigProtocol is H323AnnexL_P. Go for Avaya 4600IP phone
428197621mS H323Evt: RRQ --- Treat this as a forced login, the phone was probably rebooted (same_cs_addr 0)
428197621mS H323Evt: GK: Unregister endpoint customer name for extension 501 reason 4 urq_reason 3
428197624mS H323Evt: GK: Send URQ
428197625mS RasTx: v=Src=192.168.42.1:1719, Dst=192.168.42.20:49301 peb=0
RasMessage = unregistrationRequest
428197625mS H323Evt: RRQ --- Register extn 501 using product IP_Phone, version 6.6604, id customer name
428197625mS H323Evt: RASSRV: GetAlternate GK list returns <none>
428197627mS RasTx: v=Src=192.168.42.1:1719, Dst=192.168.42.20:49300 peb=0
RasMessage = registrationConfirm
428197629mS H323Evt: v=0 stacknum=250 State, new=ReleaseReq, old=Active id=2256
428197630mS H323Tx: 2256 dst=192.168.42.20:57634
H323 Pcol=08(Q931) Reflen=2 ref=0001(Local)
Message Type = ReleaseComplete
428197630mS H323Evt: v=0 stacknum=250 State, new=NullState, old=ReleaseReq id=2256
428197706mS RasRx: v=IFace=LAN1, Src=192.168.42.38:49301, Dst=192.168.42.1:1719 peb=0
RasMessage = registrationRequest
428197706mS H323Evt: Recv: RegistrationRequest 192.168.42.38; Extn(531), time since last RRQ-KA 55009, Endpoints registered: 41; Endpoints in registration: 1
428197707mS RasTx: v=Src=192.168.42.1:1719, Dst=192.168.42.38:49301 peb=0
RasMessage = registrationConfirm
428197714mS H323Evt: H323PhoneUser Operational: Src=192.168.42.254:9614 Dst=192.168.42.1:1720
428197764mS H323Rx: 2257 src=0.0.0.0:0
H323 Pcol=08(Q931) Reflen=2 ref=0001(Remote)
Message Type = Setup
ForwardLCParameters SRTP:[G722_64K (frames=10)] H2250 SID=01:
ReverseLCParameters SRTP:[G722_64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G711_ULAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters SRTP:[G711_ULAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G711_ALAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters SRTP:[G711_ALAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G729_AWB (frames=1)] H2250 SID=01:
ReverseLCParameters SRTP:[G729_AWB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G729_A (frames=1)] H2250 SID=01:
ReverseLCParameters SRTP:[G729_A (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G729_WB (frames=1)] H2250 SID=01:
ReverseLCParameters SRTP:[G729_WB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G722_64K (frames=10)] H2250 SID=01:
ReverseLCParameters [G722_64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G711_ULAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters [G711_ULAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G711_ALAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters [G711_ALAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G729_AWB (frames=1)] H2250 SID=01:
ReverseLCParameters [G729_AWB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G729_A (frames=1)] H2250 SID=01:
ReverseLCParameters [G729_A (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G729_WB (frames=1)] H2250 SID=01:
ReverseLCParameters [G729_WB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
428197765mS H323Evt: v=0 stacknum=250 State, new=NullState, old=NullState id=-1
428197765mS H323Tx: 0 dst=192.168.42.254:9614
H323 Pcol=08(Q931) Reflen=2 ref=0001(Local)
Message Type = ReleaseComplete
428198172mS RasRx: v=IFace=LAN1, Src=192.168.42.47:49301, Dst=192.168.42.1:1719 peb=0
RasMessage = registrationRequest
428198172mS H323Evt: Recv: RegistrationRequest 192.168.42.47; Extn(534), time since last RRQ-KA 55009, Endpoints registered: 41; Endpoints in registration: 1
428198173mS RasTx: v=Src=192.168.42.1:1719, Dst=192.168.42.47:49301 peb=0
RasMessage = registrationConfirm
428199193mS RasRx: v=IFace=LAN1, Src=192.168.42.254:4500, Dst=192.168.42.1:1719 peb=0
RasMessage = gatekeeperRequest
428199193mS H323Evt: Recv GRQ from 192.168.42.254:4500
428199194mS H323Evt: e_H225_AliasAddress_dialedDigits alias
428199194mS H323Evt: found number <501>
428199194mS RasTx: v=Src=192.168.42.1:1719, Dst=192.168.42.20:49301 peb=0
RasMessage = gatekeeperConfirm
428199204mS RasRx: v=IFace=LAN1, Src=192.168.42.254:4500, Dst=192.168.42.1:1719 peb=0
RasMessage = registrationRequest
428199204mS H323Evt: Recv: RegistrationRequest 192.168.42.254:4500 on 0; Endpoints registered: 41; Endpoints in registration: 1, tpkt user: 00000000
428199204mS H323Evt: e_H225_AliasAddress_dialedDigits alias
428199205mS H323Evt: found number <501>
428199205mS H323Evt: RRQ --- CallSigProtocol is H323AnnexL_P. Go for Avaya 4600IP phone
428199205mS H323Evt: RRQ --- Treat this as a forced login, the phone was probably rebooted (same_cs_addr 1)
428199205mS H323Evt: GK: Unregister endpoint customer name for extension 501 reason 4 urq_reason 3
428199206mS H323Evt: RRQ --- Register extn 501 using product IP_Phone, version 6.6604, id customer name
428199207mS H323Evt: RASSRV: GetAlternate GK list returns <none>
428199209mS RasTx: v=Src=192.168.42.1:1719, Dst=192.168.42.20:49301 peb=0
RasMessage = registrationConfirm
428199279mS H323Evt: H323PhoneUser Operational: Src=192.168.42.254:3720 Dst=192.168.42.1:1720
428199309mS H323Rx: 2258 src=0.0.0.0:0
H323 Pcol=08(Q931) Reflen=2 ref=0001(Remote)
Message Type = Setup
ForwardLCParameters SRTP:[G722_64K (frames=10)] H2250 SID=01:
ReverseLCParameters SRTP:[G722_64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G711_ULAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters SRTP:[G711_ULAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G711_ALAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters SRTP:[G711_ALAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G729_AWB (frames=1)] H2250 SID=01:
ReverseLCParameters SRTP:[G729_AWB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G729_A (frames=1)] H2250 SID=01:
ReverseLCParameters SRTP:[G729_A (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters SRTP:[G729_WB (frames=1)] H2250 SID=01:
ReverseLCParameters SRTP:[G729_WB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G722_64K (frames=10)] H2250 SID=01:
ReverseLCParameters [G722_64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G711_ULAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters [G711_ULAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G711_ALAW64K (frames=10)] H2250 SID=01:
ReverseLCParameters [G711_ALAW64K (frames=60)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G729_AWB (frames=1)] H2250 SID=01:
ReverseLCParameters [G729_AWB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G729_A (frames=1)] H2250 SID=01:
ReverseLCParameters [G729_A (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters [G729_WB (frames=1)] H2250 SID=01:
ReverseLCParameters [G729_WB (frames=6)] H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
ForwardLCParameters H2250 SID=01:
ReverseLCParameters H2250 SID=01: RTP=192.168.42.20(49314) , RTCP=192.168.42.20(49315) ,
428199309mS H323Evt: v=0 stacknum=250 State, new=NullState, old=NullState id=-1
428199310mS H323Tx: 0 dst=192.168.42.254:3720
H323 Pcol=08(Q931) Reflen=2 ref=0001(Local)
Message Type = ReleaseComplete