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| Chapter 4. Trunks and Lines | ||
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| System Size | EC/TRK Slot Usage for T1 | ||
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| Master |
| Slave |
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| DBS 40 + DBS 40 | No |
| Yes |
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| DBS 72 + DBS 40 | No |
| No |
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| DBS 72 + DBS 72 | No |
| Yes |
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| DBS 96 + DBS 40 | Yes |
| Yes |
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| DBS 96 + DBS 72 | Yes |
| Yes |
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| DBS 96 + DBS 96 | Yes |
| Yes |
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•Fractional T1 can be used when fewer than 24 T1 trunks are needed. Fractional T1 allows you to use only a portion of the 24 channels provided on the T1 card.
•Though each T1 Interface provides 24 trunk channels, T1 trunks do not increase the overall trunk capacity of the DBS. Each T1 channel subtracts from the total number of analog trunks that can be installed.
•With
For example, if you are installing a T1 in a DBS 96 and you only want to use 12 T1 channels, the logical number of analog trunks that would be available is 20 (32 - 12 = 20).
The number of analog trunks must be decremented in quantities of 8, the actual number of analog trunks that can be used is 16:
(32 total trunks - 16 (two
Tables
The trunk numbering shown in these tables is determined by backplane trunk port assignments. Therefore, the numbering cannot be changed.
•With
Note: Analog trunks are numbered beginning with “1.” T1 trunk channels are numbered beginning with the highest trunk channel used.
DBS Manual - Revised April 2000 |