# acu_ss_notify_hold_invoke

Performs a notify hold operation.

#### Variant

ETS 300/Q.SIG

#### Operation ID

ACU_OP_ID_NOTIFY_HOLD

#### OpType

ACU_OP_TYPE_INVOKE

#### Structure

struct acu_ss_notify_hold_invoke
{
struct acu_ext_hdr ext_hdr; /* Extension header */
struct acu_ss_hdr ss_hdr; /* Supp. services header */
struct op_byte_field due_to_alternating; /* ON if alternating between*/
/* connections */
};

The due_to_alternating field is optional, and can be set to ON or OFF. It is set to ON if alternating between connections.