code: public byte[] sendBind(OutputStream os, BindType bindType,
              int sequenceNumber, String systemId, String password,
              String systemType, InterfaceVersion interfaceVersion,
              TypeOfNumber addrTon, NumberingPlanIndicator addrNpi,
              String addressRange) throws PDUStringException, IOException {
          synchronized (os) {
              return pduSender.sendBind(os, bindType, sequenceNumber, systemId,
                      password, systemType, interfaceVersion, addrTon, addrNpi,
                      addressRange);
          }
      }
docs: /*
  (non-Javadoc)
  
  @see org.jsmpp.PDUSender#sendBind(java.io.OutputStream,
  org.jsmpp.BindType, int, java.lang.String, java.lang.String,
  java.lang.String, org.jsmpp.InterfaceVersion,
  org.jsmpp.TypeOfNumber, org.jsmpp.NumberingPlanIndicator,
  java.lang.String)