NEC ND-70919 Uživatelský manuál stáhnout pdf (Strana 36)

CHAPTER 1 GENERAL INFORMATION

System Conditions

NEAX2000 IVS

ISDN System Manual

ND-70919 (E), Issue 1.0

Page 25

Time Slot Allocation for DTI/PRT/DCH Card

On each DTI/PRT 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, in Figure 1-11, even when Channel 1 through Channel 10 have been assigned by

the system data programming (CM07 YY=01) except Channel 5, the system allocates a total of

10 time slots for all 10 channels. Therefore, to avoid allocation of unnecessary time slots, it is

recommended that consecutive channels are assigned on each DTI/PRT 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 1-11 Time Slot Allocation for DTI

CH0

DXXX

NONE

DXXX

NONE

LOWEST CHANNEL

HIGHEST CHANNEL

10 TIME SLOTS ARE

ALLOCATED EVEN

WHEN CH5 IS NOT

ASSIGNED.

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 210 211

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NEC ND-70919 Uživatelský manuál Strana 36