Regulatory Notices
Call Attempt | Minimum duration between call attempts for call | |||||
| pattern |
|
|
|
| |
Attempts | A |
| B | C | D |
|
Initial attempt | 5S | 5S | 5S | 5S |
| |
1st repeat attempt | 1 | min | 2 min | 10 min | 3 | min |
2nd repeat attempt | 1 | min | 2 min | 10 min | 3 | min |
3rd repeat attempt | 1 | min | 2 min | 10 min | 3 | min |
4th repeat attempt | End of sequence |
|
|
| ||
| (Note 1) | 2 min | 10 min | 3 | min | |
6th repeat attempt |
|
| 2 min | 10 min | 3 | min |
|
|
| End of sequence |
|
| |
7th repeat attempt |
|
| (Note 1) | 10 min | 3 | min |
nth repeat attempt |
|
|
| 10 min | 3 | min |
|
|
|
| (note 2) | (note 2) | |
Note 1: The maximum number of calls for repeat attempt call pattern A is 5 and for call pattern B is 7.
Note 2: No limit is specified for n.
Note 3: The duration given in table 3 are from cleardown to reseizure.
Extracts from BS6789:Section 3.1:1985 are reproduced with permission of BSL. Complete copies of the standard can be obtained by mail from BSI Sales.
Use as an Extension on an Approved PABX
Xircom cannot guarantee that this modem will operate correctly under all possible conditions when connected to compatible PABX equipment. Any cases of difficulty should be reported directly to Xircom.
This modem may not be connected to PABX systems which do not have a BT431A compatible socket connection.
Bell Noise
This apparatus does not incorporate circuitry to suppress