diff --git a/src/Client/Client.ts b/src/Client/Client.ts
index 8f6f833..be9ce46 100644
--- a/src/Client/Client.ts
+++ b/src/Client/Client.ts
@@ -1,5 +1,6 @@
 import EventEmitter from "events";
-import {Job} from "../Job";
+import {Job} from "../Job/Job";
+import {JobEvents} from "../Job/JobEvents";
 import Logger from "../Logger";
 import PersistentPromise from "../PersistentPromise";
 import {SmppSession} from "../SmppSession";
@@ -9,12 +10,12 @@ import ClientStatus from "./ClientStatus";
 const NanoTimer = require('nanotimer');
 const smpp = require("smpp");
 
-const AUTO_ENQUIRE_LINK_PERIOD: number = Number(process.env.AUTO_ENQUIRE_LINK_PERIOD) || 500;
+const AUTO_ENQUIRE_LINK_PERIOD: number = Number(process.env.AUTO_ENQUIRE_LINK_PERIOD) || 30000;
 const MESSAGE_SEND_UPDATE_DELAY: number = Number(process.env.MESSAGE_SEND_UPDATE_DELAY) || 500;
 
-	export class Client implements SmppSession {
-	defaultSingleJob: Job = Job.createEmptySingle();
-	defaultMultipleJob: Job = Job.createEmptyMultiple();
+export class Client implements SmppSession {
+	defaultSingleJob!: Job;
+	defaultMultipleJob!: Job;
 	private readonly eventEmitter: EventEmitter;
 	private readonly logger: Logger;
 	private readonly _id: number;
@@ -51,10 +52,6 @@ const MESSAGE_SEND_UPDATE_DELAY: number = Number(process.env.MESSAGE_SEND_UPDATE
 
 	private _url: string;
 
-	getUrl(): string {
-		return this._url;
-	}
-
 	set url(value: string) {
 		this._url = value;
 	}
@@ -67,14 +64,20 @@ const MESSAGE_SEND_UPDATE_DELAY: number = Number(process.env.MESSAGE_SEND_UPDATE
 		this.eventEmitter.emit(ClientEvents.STATE_CHANGED, this.serialize());
 	}
 
+	getUrl(): string {
+		return this._url;
+	}
+
 	setDefaultSingleJob(job: Job): void {
 		this.defaultSingleJob = job;
 		this.eventEmitter.emit(ClientEvents.STATE_CHANGED, this.serialize());
+		job.on(JobEvents.STATE_CHANGED, () => this.eventEmitter.emit(ClientEvents.STATE_CHANGED, this.serialize()));
 	}
 
 	setDefaultMultipleJob(job: Job): void {
 		this.defaultMultipleJob = job;
 		this.eventEmitter.emit(ClientEvents.STATE_CHANGED, this.serialize());
+		job.on(JobEvents.STATE_CHANGED, () => this.eventEmitter.emit(ClientEvents.STATE_CHANGED, this.serialize()));
 	}
 
 	getDefaultSingleJob(): Job {
@@ -91,7 +94,10 @@ const MESSAGE_SEND_UPDATE_DELAY: number = Number(process.env.MESSAGE_SEND_UPDATE
 	}
 
 	initialize(): void {
-		return;
+		this.defaultSingleJob = Job.createEmptySingle();
+		this.defaultMultipleJob = Job.createEmptyMultiple();
+		this.defaultSingleJob.on(JobEvents.STATE_CHANGED, () => this.eventEmitter.emit(ClientEvents.STATE_CHANGED, this.serialize()));
+		this.defaultMultipleJob.on(JobEvents.STATE_CHANGED, () => this.eventEmitter.emit(ClientEvents.STATE_CHANGED, this.serialize()));
 	}
 
 	connect(): PersistentPromise {
diff --git a/src/Client/ClientSessionManager.ts b/src/Client/ClientSessionManager.ts
index 0450ab5..9779122 100644
--- a/src/Client/ClientSessionManager.ts
+++ b/src/Client/ClientSessionManager.ts
@@ -1,6 +1,6 @@
 import fs from "fs";
 import {Client} from "./Client";
-import {Job} from "../Job";
+import {Job} from "../Job/Job";
 import Logger from "../Logger";
 import SessionManager from "../SessionManager";
 import {SmppSession} from "../SmppSession";
diff --git a/src/Job.ts b/src/Job.ts
deleted file mode 100644
index 0d28550..0000000
--- a/src/Job.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-const smpp = require("smpp");
-
-// TODO: Implement on change event and propagate it to sessions
-export class Job {
-    pdu: any;
-    perSecond?: number;
-    count?: number;
-
-    constructor(pdu: any, perSecond?: number, count?: number) {
-        this.pdu = pdu;
-        this.perSecond = perSecond;
-        this.count = count;
-    }
-
-    serialize(): string {
-        return JSON.stringify(this);
-    }
-
-    static deserialize(serialized: any): Job {
-        if (!serialized.pdu.command) {
-            throw new Error("Invalid serialized job");
-        }
-        let pdu: any = new smpp.PDU(serialized.pdu.command, serialized.pdu);
-        return new Job(pdu, serialized.perSecond, serialized.count);
-    }
-
-    static createEmptySingle(): Job {
-        return new Job({});
-    }
-
-    static createEmptyMultiple(): Job {
-        return new Job({}, 1, 1);
-    }
-}
\ No newline at end of file
diff --git a/src/Job/Job.ts b/src/Job/Job.ts
new file mode 100644
index 0000000..d592871
--- /dev/null
+++ b/src/Job/Job.ts
@@ -0,0 +1,71 @@
+import EventEmitter from "events";
+import {JobEvents} from "./JobEvents";
+
+const smpp = require("smpp");
+
+export class Job {
+	private eventEmitter: EventEmitter = new EventEmitter();
+
+	constructor(pdu: any, perSecond?: number, count?: number) {
+		this._pdu = pdu;
+		this._perSecond = perSecond;
+		this._count = count;
+	}
+
+	private _pdu: any;
+
+	get pdu(): any {
+		return this._pdu;
+	}
+
+	set pdu(value: any) {
+		this._pdu = value;
+		this.eventEmitter.emit(JobEvents.STATE_CHANGED, {});
+	}
+
+	private _perSecond?: number;
+
+	get perSecond(): number {
+		return <number>this._perSecond;
+	}
+
+	set perSecond(value: number) {
+		this._perSecond = value;
+		this.eventEmitter.emit(JobEvents.STATE_CHANGED, {});
+	}
+
+	private _count?: number;
+
+	get count(): number {
+		return <number>this._count;
+	}
+
+	set count(value: number) {
+		this._count = value;
+		this.eventEmitter.emit(JobEvents.STATE_CHANGED, {});
+	}
+
+	static deserialize(serialized: any): Job {
+		if (!serialized._pdu) {
+			return Job.createEmptyMultiple();
+		}
+		let pdu: any = new smpp.PDU(serialized._pdu.command, serialized._pdu);
+		return new Job(pdu, serialized._perSecond, serialized._count);
+	}
+
+	static createEmptySingle(): Job {
+		return new Job({});
+	}
+
+	static createEmptyMultiple(): Job {
+		return new Job({}, 1, 1);
+	}
+
+	serialize(): string {
+		return JSON.stringify(this);
+	}
+
+	on(event: string, callback: (...args: any[]) => void): void {
+		this.eventEmitter.on(event, callback);
+	}
+}
\ No newline at end of file
diff --git a/src/Job/JobEvents.ts b/src/Job/JobEvents.ts
new file mode 100644
index 0000000..d205964
--- /dev/null
+++ b/src/Job/JobEvents.ts
@@ -0,0 +1,3 @@
+export class JobEvents {
+	static readonly STATE_CHANGED: string = "STATE_CHANGED";
+}
\ No newline at end of file
diff --git a/src/SmppSession.ts b/src/SmppSession.ts
index f630016..d245474 100644
--- a/src/SmppSession.ts
+++ b/src/SmppSession.ts
@@ -1,4 +1,4 @@
-import {Job} from "./Job";
+import {Job} from "./Job/Job";
 
 // TODO: Implement on change event and propagate it to sessions
 // Do something like "onJobChange" here...
diff --git a/src/main.ts b/src/main.ts
index 2b088d2..19db8fe 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,7 +1,7 @@
 import {Client} from "./Client/Client";
 import {ClientEvents} from "./Client/ClientEvents";
 import ClientSessionManager from "./Client/ClientSessionManager";
-import {Job} from "./Job";
+import {Job} from "./Job/Job";
 import Logger from "./Logger";
 
 const smpp = require("smpp");
@@ -40,11 +40,12 @@ async function main() {
 			destination_addr: "1234567890",
 			short_message: "Hello World"
 		});
+		// client.sendMultipleDefault();
+
+		// client.on(ClientEvents.ANY_PDU, (pdu: any) => console.log(pdu));
+		client.on(ClientEvents.STATE_CHANGED, (state: any) => console.log(state.defaultMultipleJob));
 		client.setDefaultSingleJob(new Job(pdu1));
 		client.setDefaultMultipleJob(new Job(pdu1, 100, 10));
-		client.sendMultipleDefault();
-
-		client.on(ClientEvents.ANY_PDU, (pdu: any) => console.log(pdu));
 	});
 }