BIG NEWS! The Adtran Support Community is moving! In the next few weeks it will be housed in a new location. Be sure to visit our NEW Adtran Community before the end of July to check it out and verify that you can access all the resources and features that you need. If you discover any issues with your account or access, or just want to let us know about your experience, be sure to use our Feedback Form to let us know!
 | Article ID: 1527 |
| Q&A | |
T3SU 300 scrambler options
Q: T3SU 300 scrambler options
A: There are two scrambling options available for each multiplexing mode (75kbps block size or 3.158 Mbps block size):
75 kbps block size (Adtran standard):
| 2047 | This is an Adtran proprietary scrambler. On 1st generation models, choosing Enable for scrambling used this mode. |
| 1+x^43 | The ATM scrambler |
3.158 Mbps (Larscom standard):
| x^11+x^9+1 | This is an Adtran proprietary scambler. It is the same as 2047 scrambling. On older firmware versions of first generation units, choosing Enabled for the scrambler chose this mode. |
| x^20+x^17+1 | The Larscom equivalent scrambler. If you are terminating into a device other than the T3SU such as an ISP Cisco router, use this scrambling if the carrier wishes to have scrambling enabled. |
