AT&T DS1/DMi/ISDN-PRI manual 10ADMINISTRATIVE Procedure Summary

C-10ADMINISTRATIVE PROCEDURE SUMMARY

Field 5 of this word specifies an interface type of network or user. For an ISDN-PRI point-to-point link to function, one end must be translated as network and the other end as user.

This field also determines how glare is handled on this board. The following rules apply to glare

handling:

PRequests the channel as a preferred channel (this is done in the channel identification IE of the setup message)

ERequests the channel exclusively (this is done in the channel identification IE of the setup message)

USpecifies that the switch’s side of the interface is the user side

NSpecifies that the switch’s side of the interface is the network side

XSpecifies that it is not important which is the network side or the user side

1Specifies that the incoming call gets the channel and outgoing call waits to be negotiated

2Specifies that the outgoing call gets the channel and the switch negotiates the incoming call to another channel

3Outgoing call gets the channel and the switch gives a release (REL) complete (COM) on the incoming call

4Specifies that the incoming call gets the channel and the switch waits for the other end of the interface to respond (the switch would expect the other end of the interface to reject its outgoing call attempt)

TABLE C-1.Internal Definition Translations

Internal	Channel Characteristic on	Channel Characteristic on	Result
Definition	Outgoing Call From Switch	Incoming Call to Switch
X	P	E	1
X	E	P	2
N	P	P	2
U	P	P	1
N	E	E	3
U	E	E	4

NOTE: Generic 2 calls request channels as preferred except for ISDN-DCS calls which requests channels as exclusive.

Field 6 of this word controls whether level-2 and level-3 tests may be performed on this board via procedure 648.

Field 7 of this word identifies the terminal endpoint for an ISDN-PRI board (this must always be translated as 0).

Fields 8, 9, and 10 of this word define T203, T200, and N200 respectively. By varying these fields, the level-3 timer values can be changed. N200 and T200 affect the T303, T305, T308, and T313 timers according to the following equation: