Special ISDN Function Codes | Programming Reference |
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 |
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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). |
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Execution | Master: ON/OFF #94 0 (0 or 1) |
| Slave: ON/OFF #95 0 (0 or 1) |
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Options | 0=Off |
| 1=On |
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Parameter | Loopback 2 |
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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). |
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Execution | Master: ON/OFF #94 1 (0 or 1) |
| Slave: ON/OFF #95 1 (0 or 1) |
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Options | 0=Off |
| 1=On |
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| Revised April 2000 |
