asterisk*CLI> pri show sp
spans  span   
    -- Remote UNIX connection
    -- Remote UNIX connection disconnected
    -- Remote UNIX connection
    -- Remote UNIX connection disconnected
asterisk*CLI> pri show span 4
Primary D-channel: 109
Status: Up, Active
Switchtype: Q.SIG switch
Type: CPE
Remote type: Unknown node type
Overlap Dial: 1
Logical Channel Mapping: 0
Timer and counter settings:
  N200: 3
  N202: 3
  K: 7
  T200: 1000
  T201: 1000
  T202: 10000
  T203: 10000
  T303: 4000
  T305: 30000
  T308: 4000
  T309: 6000
  T312: 6000
  T313: 4000
  T316: -1
  N316: 2
  T-HOLD: 4000
  T-RETRIEVE: 4000
  T-RESPONSE: 4000
  T-RETENTION: 30000
  CC-T1: 30000
  CCBS-T2: 3600000
  CCNR-T2: 11700000
  CC-T3: 30000
Q931 RX: 1
Q931 TX: 1
Q921 RX: 126
Q921 TX: 127
Q921 Outstanding: 0 (TEI=0)
Total active-calls:0 global:0
CC records:
Overlap Recv: Yes