code: public int encodeBody(ByteArrayOutputStream bos) {
          int c = this.numberingPlanIndicator << 4;
  
          c |= (this.addressRepresentationREstrictedIndicator << 2);
          c |= (this.screeningIndicator);
          bos.write(c & 0x7F);
          return 1;
      }
docs: /*
  (non-Javadoc)
  
  @seeorg.mobicents.isup.parameters.AbstractNumber#encodeBody(java.io. ByteArrayOutputStream)