api/go/telnyx-voice-advanced-go/SKILL.md
Advanced call control features including DTMF sending, SIPREC recording, noise suppression, client state, and supervisor controls. This skill provides Go SDK examples.
npx skillsauth add team-telnyx/telnyx-toolkit telnyx-voice-advanced-goInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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go get github.com/team-telnyx/telnyx-go
import (
"context"
"fmt"
"os"
"github.com/team-telnyx/telnyx-go"
"github.com/team-telnyx/telnyx-go/option"
)
client := telnyx.NewClient(
option.WithAPIKey(os.Getenv("TELNYX_API_KEY")),
)
All examples below assume client is already initialized as shown above.
Updates client state
PUT /calls/{call_control_id}/actions/client_state_update — Required: client_state
response, err := client.Calls.Actions.UpdateClientState(
context.TODO(),
"call_control_id",
telnyx.CallActionUpdateClientStateParams{
ClientState: "aGF2ZSBhIG5pY2UgZGF5ID1d",
},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
Initiate a SIP Refer on a Call Control call.
POST /calls/{call_control_id}/actions/refer — Required: sip_address
response, err := client.Calls.Actions.Refer(
context.TODO(),
"call_control_id",
telnyx.CallActionReferParams{
SipAddress: "sip:[email protected]",
},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
Sends DTMF tones from this leg.
POST /calls/{call_control_id}/actions/send_dtmf — Required: digits
response, err := client.Calls.Actions.SendDtmf(
context.TODO(),
"call_control_id",
telnyx.CallActionSendDtmfParams{
Digits: "1www2WABCDw9",
},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
Start siprec session to configured in SIPREC connector SRS.
POST /calls/{call_control_id}/actions/siprec_start
response, err := client.Calls.Actions.StartSiprec(
context.TODO(),
"call_control_id",
telnyx.CallActionStartSiprecParams{},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
Stop SIPREC session.
POST /calls/{call_control_id}/actions/siprec_stop
response, err := client.Calls.Actions.StopSiprec(
context.TODO(),
"call_control_id",
telnyx.CallActionStopSiprecParams{},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
POST /calls/{call_control_id}/actions/suppression_start
response, err := client.Calls.Actions.StartNoiseSuppression(
context.TODO(),
"call_control_id",
telnyx.CallActionStartNoiseSuppressionParams{},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
POST /calls/{call_control_id}/actions/suppression_stop
response, err := client.Calls.Actions.StopNoiseSuppression(
context.TODO(),
"call_control_id",
telnyx.CallActionStopNoiseSuppressionParams{},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
Switch the supervisor role for a bridged call.
POST /calls/{call_control_id}/actions/switch_supervisor_role — Required: role
response, err := client.Calls.Actions.SwitchSupervisorRole(
context.TODO(),
"call_control_id",
telnyx.CallActionSwitchSupervisorRoleParams{
Role: telnyx.CallActionSwitchSupervisorRoleParamsRoleBarge,
},
)
if err != nil {
panic(err.Error())
}
fmt.Printf("%+v\n", response.Data)
The following webhook events are sent to your configured webhook URL.
All webhooks include telnyx-timestamp and telnyx-signature-ed25519 headers for verification (Standard Webhooks compatible).
| Event | Description |
|-------|-------------|
| callReferStarted | Call Refer Started |
| callReferCompleted | Call Refer Completed |
| callReferFailed | Call Refer Failed |
| callSiprecStarted | Call Siprec Started |
| callSiprecStopped | Call Siprec Stopped |
| callSiprecFailed | Call Siprec Failed |
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