diff --git a/modules/wamo/types/interfaces.ts b/modules/wamo/types/interfaces.ts
index c3e20fd..ea2c07b 100644
--- a/modules/wamo/types/interfaces.ts
+++ b/modules/wamo/types/interfaces.ts
@@ -204,6 +204,7 @@ export interface IWaMOCarrierMapper {
   carriers: INopeObservable<string[]>;
 
   reset(): Promise<void>;
+  isProductLinkedToCarrier(carrier: string): Promise<boolean>;
   registerCarrier(carrier: string): Promise<void>;
   addProductToCarrier(carrier: string, product: string): Promise<void>;
   getProductForCarrier(carrier: string): Promise<string | undefined>;
@@ -214,6 +215,13 @@ export interface IWaMOLineConnector {
   connected: INopeObservable<boolean>;
 }
 
+export interface IWaMOSimpleLineConnector {
+  connected: INopeObservable<boolean>;
+  start(): Promise<void>;
+  reset(): Promise<void>;
+  flush(): Promise<void>;
+}
+
 export interface IWaMOConverter {
   connected: INopeObservable<boolean>;