ISDN Debugging Tools The following are helpful tools used to gather information about the Lucent PortMaster (TM) 5BRI ports. Note: Changes to the global settings of the PortMaster will need to be saved, followed by a reboot of the unit as shown in the example below.  The ISDN module is loaded at boot time and will not take effect dynamically. Example: Command> set isdn-switch type dms100 Command> save all Command> reboot Show Port Command> show  sx <port> The table below gives an explanation of the field values of the "show port" command: Port Status Modem Status          Description NO-SERVICE  DCD- CTS- TELCO- NT1- No SPID set NO-SERVICE  DCD- CTS- TELCO- NT1+ No cable or no circuit                                    to Telephone Company NO-SERVICE  DCD- CTS+ TELCO+ NT1+ Cable and ISDN circuit                                   OK but SPID not                                   registered IDLE        DCD- CTS+ TELCO+ NT1+ SPID registered and                                    ready to use. ESTABLISHED DCD- CTS+ TELCO+ NT1+ Connecting or providing                                     device service but no                                    carrier sensed ESTABLISHED DCD+ CTS+ TELCO+ NT1+ Connected ESTABLISHED DCD+ CTS- TELCO+ NT1+ Connected with V.120                                    async but flow controlled                                    by other end Show ISDN Command> show ISDN This command will show the state of  the D channel  and related S-ports. Conditions of the D channel  may be seen in the STATE column as ACTIVE, INACTIVE or 'STARTING'.  The 'STARTING' condition may indicate a loop or  a wiring error on the telco side of the circuit. Command> show isdn D  Ports  State Chge Start Up  Down Time Sess In  Out Err -- ------ ---------- ----- --- ---- ---- ---- --- --- --- 5 S10/S11 Active  0     2     2   0    0    0  23  19  0 6 S12/S13 Active  0     2     2   0    0    0  23  19  0 7 S14/S15 Active  0     2     2   0    0    0  24  20  0   The table below gives an explanation of  the field values of the "show isdn" command: Change = Minutes since last change in status Start  = # of times NT1 has attempted to bring up link Up     = # of times its gone to UP status Down   = # of times its gone to DOWN status Time   = # of times D channel has timed out attempting to             bring up the link Sessions = # of times PortMaster has received a connect             message from the  switch In     = # of input ISDN frames on B channel Out    = # of output ISDN frames on B channel ERR    = number of CRC, abort, overrun, bbc          (bad byte count) and lost frame errors.