NEC NEAX2000 IVS2 system manual Time Slot Allocation for DTI/DCH Card

CHAPTER 1 GENERAL INFORMATION

System conditions

Time Slot Allocation for DTI/DCH Card

On each DTI card, the system recognizes the lowest and highest channel numbers to which trunk numbers have been assigned, and allocates time slots to all the channels within them. If trunk numbers are assigned to discontinuous channels in this case, the system also allocates time slots to channels not assigned.

For example, as shown in Figure 1-8, even when Channel 1 through Channel 10 have been assigned by the system data programming (CM07 YY=01) excepting Channel 5, the system allocates a total of 10 time slots for all the ten channels. Therefore, to avoid allocation of unnecessary time slots, it is recommended that consecutive channels are assigned on each DTI card.

In the case of the DCH card, one time slot is allocated for setting up a fixed path between the DTI and the DCH by assigning Channel 16 of the DTI as the D Channel.

Figure 1-8 Time Slot Allocation for DTI

10	DXXX
9	DXXX
6	DXXX
5	NONE
4	DXXX
1	DXXX
CH0	NONE

HIGHEST CHANNEL

10 TIME SLOTS ARE ALLOCATED EVEN WHEN CH5 IS NOT ASSIGNED.

LOWEST CHANNEL

NEAX2000 IVS2 Q-SIG System Manual	Page 13
ND-70923 (E), Issue 1.0