Something

[root@pbx-1 ~]# cat /proc/zaptel/1
Span 1: WPT1/0 "wanpipe1 card 0" B8ZS/ESF

           1 WPT1/0/1 Clear (In use)
           2 WPT1/0/2 Clear (In use)
           3 WPT1/0/3 Clear (In use)
           4 WPT1/0/4 Clear (In use)
           5 WPT1/0/5 Clear (In use)
           6 WPT1/0/6 Clear (In use)
           7 WPT1/0/7 Clear (In use)
           8 WPT1/0/8 Clear (In use)
           9 WPT1/0/9 Clear (In use)
          10 WPT1/0/10 Clear (In use)
          11 WPT1/0/11 Clear (In use)
          12 WPT1/0/12 Clear (In use)
          13 WPT1/0/13 Clear (In use)
          14 WPT1/0/14 Clear (In use)
          15 WPT1/0/15 Clear (In use)
          16 WPT1/0/16 Clear (In use)
          17 WPT1/0/17 Clear (In use)
          18 WPT1/0/18 Clear (In use)
          19 WPT1/0/19 Clear (In use)
          20 WPT1/0/20 Clear (In use)
          21 WPT1/0/21 Clear (In use)
          22 WPT1/0/22 Clear (In use)
          23 WPT1/0/23 Clear (In use)
          24 WPT1/0/24 HDLCFCS (In use)
[root@pbx-1 ~]#