Спасибо за подсказку, сделал#show isdn status
Global ISDN Switchtype = primary-net5
ISDN Serial0/0/0:15 interface
dsl 0, interface ISDN Switchtype = primary-net5
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = AWAITING_ESTABLISHMENT
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x80007FFF
Number of L2 Discards = 0, L2 Session ID = 200
Total Allocated ISDN CCBs = 0
cisco#show voice register all
Pool Tag 1
Config:
Mac address is 0090.8F0B.AE8A
Proxy Ip address is 0.0.0.0
DTMF Relay is disabled
Dialpeers created:
Statistics:
Active registrations : 0
Total Registration Statistics
Registration requests : 0
Registration success : 0
Registration failed : 0
unRegister requests : 0
unRegister success : 0
unRegister failed : 0
Не нашел, где в MP124 выставить sip-client