Version 6.2 795 February 2011
SIP User's Manual 12. Configuration Parameters Reference
Parameter Description
ISDNInCallsBehavior = 67584 (i.e., 2048 + 65536).
[ISDNInCallsBehavior_x]
Same as the description for the parameter
ISDNInCallsBehavior, but per trunk (i.e., where x depicts the
Trunk ID).
Web/EMS: Q.931 Layer Response
Behavior
[ISDNIBehavior]
Bit-field used to determine several behavior options that
influence the behaviour of the Q.931 protocol.
[0] = Disable (default)
[1] NO STATUS ON UNKNOWN IE = Q.931 Status
message isn't sent if Q.931 received message contains
an unknown/unrecognized IE. By default, the Status
message is sent.
Note: This value is applicable only to ISDN variants in
which sending of Status message is optional.
[2] NO STATUS ON INV OP IE = Q.931 Status message
isn't sent if an optional IE with invalid content is received.
By default, the Status message is sent.
Note: This option is applicable only to ISDN variants in
which sending of Status message is optional.
[4] ACCEPT UNKNOWN FAC IE = Accepts
unknown/unrecognized Facility IE. Otherwise, the Q.931
message that contains the unknown Facility IE is rejected
(default).
Note: This option is applicable only to ISDN variants
where a complete ASN1 decoding is performed on
Facility IE.
[128] SEND USER CONNECT ACK = The Connect ACK
message is sent in response to received Q.931 Connect;
otherwise, the Connect ACK is not sent (default).
Note: This option is applicable only to Euro ISDN User
side outgoing calls.
[512] EXPLICIT INTERFACE ID = Enables to configure
T1 NFAS Interface ID (refer to the parameter
ISDNNFASInterfaceID_x).
Note: This value is applicable only to 4/5ESS, DMS, NI-2
and HKT variants.
[2048] ALWAYS EXPLICIT = Always set the Channel
Identification IE to explicit Interface ID, even if the B-
channel is on the same trunk as the D-channel.
Note: This value is applicable only to 4/5ESS, DMS
variants.
[32768] ACCEPT MU LAW =Mu-Law is also accepted in
ETSI.
[65536] EXPLICIT PRES SCREENING = The calling
party number (octet 3a) is always present even when
presentation and screening are at their default.
Note: This option is applicable only to ETSI, NI-2, and
5ESS.
[131072] STATUS INCOMPATIBLE STATE = Clears the
call on receipt of Q.931 Status with incompatible state.
Otherwise, no action is taken (default).
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