private Config config;
public TransportManager(TransactionManager transactionManager,
Config config, Logger logger) {
sipParser = new SipParser();
datagramSockets = new Hashtable<SipTransportConnection, DatagramSocket>();
messageSenders = new Hashtable<SipTransportConnection, MessageSender>();
messageReceivers = new Hashtable<SipTransportConnection, MessageReceiver>();
this.transactionManager = transactionManager;
this.config = config;