一、前言目前我段新使用的复线继电半自动采用双线两端接地,做为两个回线使用,电话机接在两条实线之间,而实际上电话机是接在两条单线上(如图一所示)。此种接续造成串杂音干扰,严重者至不能通话。为了提高通话质量,我们进行了多方面考查,从而进行了改进。经 I. INTRODUCTION Currently, the newly used double-track relay in our segment is semi-automatically grounded at both ends of the double line, and used as two return lines. The phone is connected between two solid lines. In fact, the phone is connected to two single lines (As shown in Figure 1). This connection caused by the crosstalk noise, in serious cases can not call. In order to improve the quality of the call, we conducted a multi-faceted examination and made improvements. through