This topic describes:
This message primitive can be returned when:
An ACU_D_CHANNEL_STATUS_RQ primitive is sent to the stack.
The Acu_send_d_channel_status_change bit is set in the Acu_behaviour substructure included in ISDN_PROTOCOL_PARMS_Q931CC.
This message primitive must be sent to the ACU_SAPI_MGT SAPI, rather than the ACU_SAPI. To do so, specify ACU_SAPI_MGT in the to_sapi field in the outgoing ACU_MESSAGE structure.
Indicates the status of the D channel.
An allocated call.
The following table lists the variants under which each macro is supported for this primitive. In this table, x indicates both NT and TE sides.
Macro |
4 |
E |
N |
D |
E |
V |
H |
A |
N |
K |
T |
Q |
D |
T |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Acu_d_channel_state |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
Acu_d_channel_nb |
|
|
|
|
|
|
|
|
|
|
|
|
x |
|
Macro |
Description |
Q.931 IE |
---|---|---|
Acu_d_channel_state |
State of D channel: 0: OFF 1: ON |
Does not map to an IE. |
Acu_d_channel_nb |
Equivalent to B channel number (for DPNSS only). |
Does not map to an IE. |