Telenetics Modular Nest manual Combining NC Ports With Backplane NMS Bus DIP Switches

	Part No. TEL–09949, Rev A
Pre-Installation Information and Activities	June 2001
	Page 23 of 34

	A8		A6		A4		A2
DIAL LINE A
2W LEASE
A9		A7		A5		A3		A1
	B8		B6		B4		B2
DIAL LINE B
2W/4W LEASE
B9		B7		B5		B3		B1
SLOT9	8	7	6	5	4	3	2	1
									Bus Master
A	A	A	A	A	A	A	A	A	Switch
DTE	DTE	DTE	DTE	DTE	DTE	DTE	DTE	DTE
B	B	B	B	B	B	B	B	B	NMS BUS
									2	6	1
									1	5	2
									1	4	2
									1	3	2
									1	2	2
									1	1	2
NC				NC BUS				NC
MSTR	IN	OUT					OUT	MSTR
2								1
COMM		+5V +12V -12V							NC Port and
					AC POWER				Bus Master Locations
									Are within Shaded Areas

Figure 11. Combining NC Ports With Backplane NMS Bus DIP Switches

Cautions and Limitations for Network Management Cabling

The enclosure daisy-chain (leased line) interface and the multi-drop (dial line) bus features do not support certain NC cabling applications.You can connect multiple NC Master modems to operate in a daisy-chain or operate in a multi-drop bus configuration. However, there can be only one NC slave configured in an enclosure multi-drop bus group or daisy-chain.

Check your NMS documentation for the maximum number of modems per channel. Do not bus more modem NC signals to a single NC port than the network manager can handle on a single channel.

Some applications require multiple NC slaves in an enclosure using the multi-drop NC bus. In this case, use the larger backplanes to accommodate multiple groups. For example, one NC slave is allowed for each group. For the number of groups that each backplane can accommodate and the number of modem cards in those slots, refer to Table 4.