Nortel Networks 553-3001-211 manual Shows the possible selection of the NTBK51AA D-channel

NT5D97 Dual-port DTI2/PRI2 card Page 333 of 894

Table 121

Ring ground switch settings (Part 2 of 2)

Switch	Description		S2 switch settingS
3	Trunk 1	Transmit	OFF-Ring line is not grounded
			ON- Ring line is grounded
4	Trunk 1	Receive	OFF-Ring line is not grounded
			ON- Ring line is grounded

DCH Address select switch for NTBK51AA daughter board for NT5D97AA/AB

In case of an on-board NTBK51AA D-channel daughterboard, set of four switches (S3) provide the daughterboard address. Refer to Table 129 on page 338.

Note: Switch 8 of S3 (S3-8) does not require a switch setting to select between the on-board NTBK51AA D-channel daughterboard and an external DCHI/MSDL. The NT5D97 detects when the on-board NTBK51AA D-channel daughterboard is used.

Table 122

DCH mode and address switch settings

Switch	Description	S3 switch setting
1-4	D-channel daughterboard address	See Table 123
5-8	For future use	OFF

Table 123 shows the possible selection of the NTBK51AA D-channel.

Table 123

NTBK51AA daughterboard address select switch settings (Part 1 of 2)

Device Address		Switch Setting
0	OFF	OFF	OFF	OFF
1	ON	OFF	OFF	OFF

Circuit Card Description and Installation