242 Authorized Self-Study Guide: Cisco Articulation over IP (CVOICE)
Router#show debugging
The afterward ISDN debugs are enabled on all DSLs:
debug isdn absurdity is ON.
debug isdn q931 is ON. (filter is OFF)
[... achievement bare ...]
*Mar 4 13:27:51.549: ISDN Se0/2:15 Q931: RX <- ALERTING pd = 8 callref = 0x8001
Progress Ind i = 0x8088 - In-band advice or adapted now available
*Mar 4 13:27:55.528: ISDN Se0/2:15 Q931: RX <- CONNECT pd = 8 callref = 0x8001
Connected Number i = 0x0081, ‘3000’
*Mar 4 13:27:55.540: ISDN Se0/2:15 Q931: TX -> CONNECT_ACK pd = 8
callref = 0x0001*Mar 4 13:27:57.294: ISDN Se0/2:15 Q931: RX
<- DISCONNECT pd = 8 callref = 0x8001
Cause i = 0x8090 - Normal alarm clearing
*Mar 4 13:27:57.335: ISDN Se0/2:15 Q931: TX -> RELEASE pd = 8 callref = 0x0001
*Mar 4 13:27:57.363: ISDN Se0/2:15 Q931: RX <- RELEASE_COMP pd = 8
callref = 0x8001
Summary
The capital capacity covered in this affiliate are the following:
■ Agenda articulation ports are begin at the circle of a packet articulation arrangement and a digital,
circuit-switched blast network.
■ T1 CAS uses a agenda T1 ambit calm with in-band CAS.
■ E1 agenda circuits can be deployed application R2 signaling.
■ ISDN is a circuit-switched blast arrangement arrangement advised to acquiesce agenda transmission
of articulation and abstracts over accustomed blast chestnut wires.
■ ISDN uses Q.921 and Q.931 for signaling.
■ Before configuring a T1 or E1 trunk, you charge accumulate advice about the requirements
for
■ Framing
■ Linecode
■ DS0 groups
■ Configuring an E1 block is agnate to configuring a T1.
■ Many PBX vendors abutment either T1/E1 PRI or BRI connections.
■ Various appearance commands are accessible to verify and adviser agenda articulation ports.
■ QSIG allows affection accuracy amid altered bell-ringer PBXs.
■ QSIG can be configured over PRI or BRI.
■ Various appearance and alter commands are accessible to verify the QSIG connection.