Toshiba Strata CTX100, Installation And Maintenance Manual

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Strata CTX I&M 10/02
6-1
T1
T1
6
This chapter covers information on using T1/DS-1 interfacing for the Strata CTX systems.
Channelization
The Strata RDTU PCB provides T1/DS-1 interface for up to 24 channels on the Strata CTX. Each
channel can be individually set for loop start, ground start, Tie, or DID line operation (voice only,
not data lines). Each RDTU can be set in system programming to activate (1~8), (1~16), or (1~24)
channels (lines). Fractional increments of 4, 12, and 20 are also possible but the RDTU will still
assign 8, 16, or 24 channels respectively in system software.
Example: If only 12 channels of fractional T1 are used, assign RDTU as a 16 channel RDTU. The
system will assign 16 CO lines to the RDTU even though only 12 CO lines will be used.
Slot Assignments
Up to eight RDTU PCBs can be installed in a Strata CTX to provide up to 192 lines. RDTU PCBs
can be installed in the same cabinets that have analog type CO line PCBs installed. RDTU PCBs
must be placed in designated slots in each of the Strata CTX cabinets. (See
Table 1-54 on page
1-38 for RDTU slot installation rules)
If an RDTU is installed in a cabinet (in some cases one or two slots to the right of the RDTU may
not be used in that cabinet) the number of unusable slots in a cabinet (none, 1 or 2) depends on
which slot the RDTU occupies and how many lines (8, 16, or 24) the RDTU is programmed to
provide.