Philips T-SMART DBS-EX23-530 - Manual (Page 88)

Special ISDN Function Codes Programming Reference
4-36 DBS-EX23-530 Revised April 2000
Special ISDN Function Codes
The following function codes are used for troubleshooting and maintenance
of the ISDN Interface.
These codes can be entered remotely by dialing into the DBS and entering the
ISDN maintenance mode. To enter the ISDN maintenance mode, type an
uppercase “T” at the REMT prompt.
Parameter Loopback 1
Description Loopbacks provide diagnostic tests of the ISDN circuit or the
ISDN connection to the CO.
This loopback initiates a loopback with the CO. The loopback
takes place through the Line Build Out (LBO) chip on the ISDN
card.
This loopback is typically used to check the continuity between
the CO, CSU, MDF, and ISDN card.
Note: Before executing this loopback, you must first enter the pro-
gramming authorization code (#98 9999).
Execution Master: ON/OFF #94 0 (0 or 1)
Slave: ON/OFF #95 0 (0 or 1)
Options 0=Off
1=On
Parameter Loopback 2
Description Loopbacks provide diagnostic tests of the ISDN circuit or the
ISDN connection to the CO.
This loopback also initiates a loopback with the CO. Loopback 2
is identical to Loopback 1, except that it loops back through the
Framer chip on the ISDN card, thereby testing more of the ISDN
circuitry.
Note: Before executing this loopback, you must first enter the pro-
gramming authorization code (#98 9999).
Execution Master: ON/OFF #94 1 (0 or 1)
Slave: ON/OFF #95 1 (0 or 1)
Options 0=Off
1=On