SMPP using WSO2 - wso2

Question

Hi Followed the blog mentioned in SMS Transport sender in wso2 ESB and configured axis2.xml for transportSender and transportReceiver. I am able to send a message from ESB to SMPP simulator but I am unable to receive message from SMPP simulator to ESB.
In the SMPP Simulator, I tried by adding bot 't'/'r' to enable transmitter/receiver and also tried by giving tr assuming that it is for tranceiver in users.txt but still I am unable to get a response in ESB.
Could you please help in implementing SMPP -> ESB scenario. Any link that describes this procedure also helpful for me. ( I am unable to find such)
I am editing this to make my scenario more clear
My simulator is opensmpp-sim. I added the user details in user.txt as
name=esb
password=esb
timeout=unlimited
bound=t,r
I executed the simulator with port 2775.
In ESB, axis2.xml I gave the following configurations
Transport Receiver
<transportReceiver name="sms" class="org.apache.axis2.transport.sms.SMSMessageReciever">
<parameter name="systemType">cp</parameter>
<parameter name="systemId">esb</parameter>
<parameter name="password">esb</parameter>
<parameter name="host">192.168.0.2</parameter>
<parameter name="port">2775</parameter>
<parameter name="phoneNumber">94777179968</parameter>
</transportReceiver>
Transport Sender
<transportSender name="sms" class="org.apache.axis2.transport.sms.SMSSender">
<parameter name="systemType">cp</parameter>
<parameter name="systemId">esb</parameter>
<parameter name="password">esb</parameter>
<parameter name="host">127.0.0.1</parameter>
<parameter name="port">2775</parameter>
</transportSender>
Note: 192.168.0.2 = 127.0.0.1 = localhost
Scenarios
1. Sending a message from ESME (ESB) to SMSC (Simulator)
Sequence
<sequence xmlns="http://ws.apache.org/ns/synapse" name="TEST_SMS">
<send>
<endpoint key="SMSC"/>
</send>
</sequence>
Endpoint
sms://94777179968
I exposed this sequence as a REST API. When I send a message, the message reached Simulator but there is no response in return.
2. Sending a message from SMSC (Simulator) to ESMC (ESB)
From simulator when I send message, it reaches ESB. In debug mode the message is printed in ESB log. But I am unable to handle it. How can I configure proxy service/ sequence to get that message. My goal is to get that message and initiate a process.
Thanks in advance.