diff --git a/go.mod b/go.mod
index a10c961c..b9cc204a 100644
--- a/go.mod
+++ b/go.mod
@@ -12,8 +12,8 @@ require (
 	github.com/livekit/mageutil v0.0.0-20250511045019-0f1ff63f7731
 	github.com/livekit/media-sdk v0.0.0-20250620175140-c86da91c22a2
 	github.com/livekit/mediatransportutil v0.0.0-20250519131108-fb90f5acfded
-	github.com/livekit/protocol v1.40.1-0.20250827075523-9bd0fc7c95be
-	github.com/livekit/psrpc v0.6.1-0.20250726180611-3915e005e741
+	github.com/livekit/protocol v1.41.1-0.20250919162624-3476f457ed91
+	github.com/livekit/psrpc v0.7.0
 	github.com/livekit/server-sdk-go/v2 v2.11.1
 	github.com/livekit/sipgo v0.13.2-0.20250601220430-a77cc3f220fb
 	github.com/mjibson/go-dsp v0.0.0-20180508042940-11479a337f12
@@ -33,6 +33,7 @@ require (
 )
 
 require (
+	github.com/nyaruka/phonenumbers v1.6.5 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/otel v1.37.0 // indirect
 	go.opentelemetry.io/otel/metric v1.37.0 // indirect
diff --git a/go.sum b/go.sum
index 4fa16ad5..62638b26 100644
--- a/go.sum
+++ b/go.sum
@@ -127,10 +127,10 @@ github.com/livekit/media-sdk v0.0.0-20250620175140-c86da91c22a2 h1:uHDhc7gk5Wcxd
 github.com/livekit/media-sdk v0.0.0-20250620175140-c86da91c22a2/go.mod h1:7ssWiG+U4xnbvLih9WiZbhQP6zIKMjgXdUtIE1bm/E8=
 github.com/livekit/mediatransportutil v0.0.0-20250519131108-fb90f5acfded h1:ylZPdnlX1RW9Z15SD4mp87vT2D2shsk0hpLJwSPcq3g=
 github.com/livekit/mediatransportutil v0.0.0-20250519131108-fb90f5acfded/go.mod h1:mSNtYzSf6iY9xM3UX42VEI+STHvMgHmrYzEHPcdhB8A=
-github.com/livekit/protocol v1.40.1-0.20250827075523-9bd0fc7c95be h1:KeqTnGdU8HybxjAjQNAHTZ3nEFVynqgK4ZmiQfz3cl8=
-github.com/livekit/protocol v1.40.1-0.20250827075523-9bd0fc7c95be/go.mod h1:Scx8arfj5y65w6EYA3ZIKJafoN2xBuV8pauvyrvI4eg=
-github.com/livekit/psrpc v0.6.1-0.20250726180611-3915e005e741 h1:KKL1u94l6dF9u4cBwnnfozk27GH1txWy2SlvkfgmzoY=
-github.com/livekit/psrpc v0.6.1-0.20250726180611-3915e005e741/go.mod h1:AuDC5uOoEjQJEc69v4Li3t77Ocz0e0NdjQEuFfO+vfk=
+github.com/livekit/protocol v1.41.1-0.20250919162624-3476f457ed91 h1:XoxTN5GkqZCrUz02bTxQQhB34yDgSWnmVv12oQJgpuo=
+github.com/livekit/protocol v1.41.1-0.20250919162624-3476f457ed91/go.mod h1:vhMS30QoEyH2p34vi6X1eWkC4EMV72ZGZwQb74ajY7A=
+github.com/livekit/psrpc v0.7.0 h1:rtfqfjYN06WJYloE/S0nmkJ/Y04x4pxLQLe8kQ4FVHU=
+github.com/livekit/psrpc v0.7.0/go.mod h1:AuDC5uOoEjQJEc69v4Li3t77Ocz0e0NdjQEuFfO+vfk=
 github.com/livekit/server-sdk-go/v2 v2.11.1 h1:mBRlkstQxueAl+2BHqQad1wTzbyyC4DYbA6VE1UUajw=
 github.com/livekit/server-sdk-go/v2 v2.11.1/go.mod h1:x9JXFdPeDPr0jdObS7pPfcytxYLdxNQhLk0pK/NcHSg=
 github.com/livekit/sipgo v0.13.2-0.20250601220430-a77cc3f220fb h1:onh9h110573vcxmse38aSZifEsRB8bbrXu2VYVt8PC0=
@@ -161,6 +161,8 @@ github.com/nats-io/nkeys v0.4.11 h1:q44qGV008kYd9W1b1nEBkNzvnWxtRSQ7A8BoqRrcfa0=
 github.com/nats-io/nkeys v0.4.11/go.mod h1:szDimtgmfOi9n25JpfIdGw12tZFYXqhGxjhVxsatHVE=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
+github.com/nyaruka/phonenumbers v1.6.5 h1:aBCaUhfpRA7hU6fsXk+p7KF1aNx4nQlq9hGeo2qdFg8=
+github.com/nyaruka/phonenumbers v1.6.5/go.mod h1:7gjs+Lchqm49adhAKB5cdcng5ZXgt6x7Jgvi0ZorUtU=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.1.0 h1:8SG7/vwALn54lVB/0yZ/MMwhFrPYtpEHQb2IpWsCzug=
diff --git a/pkg/sip/client.go b/pkg/sip/client.go
index 87e4edf5..459d7080 100644
--- a/pkg/sip/client.go
+++ b/pkg/sip/client.go
@@ -221,6 +221,7 @@ func (c *Client) createSIPParticipant(ctx context.Context, req *rpc.InternalCrea
 		maxCallDuration: req.MaxCallDuration.AsDuration(),
 		enabledFeatures: req.EnabledFeatures,
 		mediaEncryption: enc,
+		displayName:     req.DisplayName,
 	}
 	log.Infow("Creating SIP participant")
 	call, err := c.newCall(ctx, c.conf, log, LocalTag(req.SipCallId), roomConf, sipConf, state, req.ProjectId)
diff --git a/pkg/sip/outbound.go b/pkg/sip/outbound.go
index e7678df6..b71e652c 100644
--- a/pkg/sip/outbound.go
+++ b/pkg/sip/outbound.go
@@ -62,6 +62,7 @@ type sipOutboundConfig struct {
 	maxCallDuration time.Duration
 	enabledFeatures []livekit.SIPFeature
 	mediaEncryption sdp.Encryption
+	displayName     *string
 }
 
 type outboundCall struct {
@@ -113,7 +114,7 @@ func (c *Client) newCall(ctx context.Context, conf *config.Config, log logger.Lo
 		Host:      sipConf.host,
 		Addr:      contact.Addr,
 		Transport: tr,
-	}, contact, func(headers map[string]string) map[string]string {
+	}, contact, sipConf.displayName, func(headers map[string]string) map[string]string {
 		c := call
 		if len(c.sipConf.attrsToHeaders) == 0 {
 			return headers
@@ -648,10 +649,14 @@ func (c *outboundCall) transferCall(ctx context.Context, transferTo string, head
 	return nil
 }
 
-func (c *Client) newOutbound(log logger.Logger, id LocalTag, from, contact URI, getHeaders setHeadersFunc) *sipOutbound {
+func (c *Client) newOutbound(log logger.Logger, id LocalTag, from, contact URI, displayName *string, getHeaders setHeadersFunc) *sipOutbound {
 	from = from.Normalize()
+	if displayName == nil { // Nothing specified, preserve legacy behavior
+		displayName = &from.User
+	}
+
 	fromHeader := &sip.FromHeader{
-		DisplayName: from.User,
+		DisplayName: *displayName,
 		Address:     *from.GetURI(),
 		Params:      sip.NewParams(),
 	}