4.19.12. SlotId (Slot Identifier)

Description: The SlotId parameter defines the logical time slot the initial B channel, defined by BChanId, is using. B channels are then sequentially mapped to time slots for a count of Count.

For E-1 ISDN, the mapping of channels to time slots occurs in two sets of BChanId, SlotId, Direction and Count definitions. The first set of definitions map the time slots before the D channel, and the second set maps the slots after the D channel.

For example, on an E-1 ISDN board with four network interfaces, where time slot 16 is used for signaling on all four lines, SlotId for all four lines would be as follows

defineBSet=10,1,1,30, 0,1,1,1,20,1, 1,1,3,15, 16,17,3,15,0
defineBSet=20,2,1,30, 0,1,1,1,20,1, 1,1,3,15, 16,17,3,15,0
defineBSet=30,3,1,30, 0,1,1,1,20,1, 1,1,3,15, 16,17,3,15,0
defineBSet=40,4,1,30, 0,1,1,1,20,1, 1,1,3,15, 16,17,3,15,0

For all lines in this example, channels 1 to 15 are sequentially mapped to time slots 1 to 15 and channels 16 to 30 are mapped to time slots 17 to 31.

For E-1 clear channel lines where time slot 16 is not used for signaling, additional defineBSet commands are added to clear channel 31 and to map time slot 16. Both StartChan and BChanId are set to a value of 31, NumChans and Count are set to a value of 1, and SlotId is set to 16 as follows:

defineBSet=50,1,31,1, 0,0,0,1,21,1, 31,16,3,1,0
defineBSet=60,2,31,1, 0,0,0,1,21,1, 31,16,3,1,0
defineBSet=70,3,31,1, 0,0,0,1,21,1, 31,16,3,1,0
defineBSet=80,4,31,1, 0,0,0,1,21,1, 31,16,3,1,0 

Values:

• 1 to 24 (T-1)
• 1 to 30 (E-1 ISDN)
• 1 to 31 (E-1 clear channel)

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