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!
card type e1 1
!
network-clock-participate E1 1/0
!
isdn switch-type primary-net5
!
controller E1 1/0
framing NO-CRC4
pri-group timeslots 1-31
!
!
interface Serial1/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
!
dial-peer voice 1000 pots
destination-pattern 1…
port 1/0:15
forward-digits 4
!

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Testing an ISDN CALL
isdn test call interface serial 2/7:15 7030

———————–
Debugging and ISDN Call
debug isdn q931
debug isdn q931 interface serial 2/7:15

EXAMPLE
%ISDN-6-DISCONNECT: Interface Serial0/1/0:0 disconnected from unknown , call lasted 29 seconds
ISDN Se1/0:15 Q931: RX <- SETUP pd = 8 callref = 0x0086
Bearer Capability i = 0x8890
Standard = CCITT
Transfer Capability = Unrestricted Digital
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98381
Exclusive, Channel 1
Called Party Number i = 0x81, ‘7033’
Plan:ISDN, Type:Unknown
ISDN Se1/0:15 Q931: Received SETUP callref = 0x8086 callID = 0x0007 switch = primary-net5 interface = User
%LINK-3-UPDOWN: Interface Serial1/0:0, changed state to up
%ISDN-6-CONNECT: Interface Serial1/0:0 is now connected to N/A N/A
ISDN Se1/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x8086
Channel ID i = 0xA98381
Exclusive, Channel 1
ISDN Se1/0:15 Q931: TX -> CONNECT pd = 8 callref = 0x8086
Channel ID i = 0xA98381
Exclusive, Channel 1
ISDN Se1/0:15 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x0086
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0:0, changed state to up