*CLI> zap show channels
   Chan Extension  Context         Language   MusicOnHold
 pseudo            sip-internal
      1            sip-internal
      2            sip-internal
      3            sip-internal
      4            sip-internal
      5            sip-internal
      6            sip-internal
      7            sip-internal
      8            sip-internal
      9            sip-internal
     10            sip-internal
     11            sip-internal
     12            sip-internal
     13            sip-internal
     14            sip-internal
     15            sip-internal
     16            sip-internal
     17            sip-internal
     18            sip-internal
     19            sip-internal
     20            sip-internal
     21            sip-internal
     22            sip-internal
     23            sip-internal