2N TELEKOMUNIKACE a.s., www.2n.cz
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ISDN Layer 3 Message Status
ID
Name
Name acc. to Q.931
Description on NT interface
Description on TE
interface
0
NULL
Null
Rest status, ready for call
1
CINIT
Call Initiated
Call from BRI indicated
Call to BRI started
2
OVSEND
Overlap Sending
Gradual dialling receiving
Gradual dialling sending
3
OPROC
Outgoing Call
Proceeding
Dialling from BRI terminated
Dialling to BRI
terminated
4
CDELIV
Call Delivered
Call from BRI ringing
Call to BRI ringing
6
CPRES
Call Present
Call to BRI started
Call from BRI indicated
7
CRECV
Call Received
Call to BRI ringing
Call from BRI ringing
8
CONREQ
Connect Request
Call to BRI answered
Call from BRI answered
9
IPROC
Incoming Call
Proceeding
Dialling to BRI terminated
Dialling from BRI
terminated
10
ACTIVE
Active
Connected call
11
DISREQ
Disconnect Request
End of call from BRI
End of call to BRI
12
DISIND
Disconnect Indication
End of call to BRI
End of call from BRI
19
RELREQ
Release Request
Channel release request
25
OVRECV
Overlap Receiving
Gradual dialling sending
Gradual dialling receiving
61
RSTREQ
Restart Request
Channel restart request sent
62
RSTART
Restart
Channel restart request
received