User guide

91
DIP Switch Settings for 6X21AD Line Card
(NTP 297-8991-805, Hardware Description Manual)
Note: DIP switch settings for the card are dependent on the customer
equipment, distance from the office, and cable characteristics
Note: Default setting from the factory are S1 OFF, S3 ON, S3 & S4 OFF.
Ralationship of this setting is for a Nortel UDLC line that is
Non-loaded, and has a signaling level required for a .14 peak to
peak voltage (Vpp) setting.
*1 MSB phone sets with long loops (21-24 dB estimated measured loss
(EML))
*2 MSB phone sets with medium loops (17-21 dB EML)
*3 MSB phone sets with medium loops (4-17 db EML)
*4 MSB phone sets with short loops (0-4 dB EML)
*5 Nortel Networks universal digital loop carriers (UDLCs)
*6 Other vendor UDLCs
*7 NT6X21AC equivalent settings
APPL
Item
#
D/A Voice (S1) Balance (S2) Signaling Level (S3)
ON OFF ON OFF
Both
ON
Only
S4 ON
Only
S3 ON
Both
OFF
0 dB -3.5 dB NL 9+2 1.3Vpp .8Vpp .6Vpp .14Vpp
*1 X X X
*2 X X X
*3 X X X
*4 X X X
*5 X X X
*6 X X X
*7 X X X