680 NT8D14 Universal Trunkcard
Characteristic CO/FX/WATS
trunks DID or tie
trunks RAN
trunks Paging
trunks
DC signaling loop length
(max) 1700-ohms loop with
near-end battery of
–42.75 V
2450-ohms loop with
near-end battery of
–44 V
600/
900-ohms
loop
600 ohms
loop
Far-end battery –42 to –52.5 V (Note
4) –42 to –52.5 V –42 to –52
VN/A
Minimum detected loop
current 20 mA 10 mA 10 mA N/A
Ground potential
difference ±3 V ±1 V ±1 V
Low DC loop resistance
during outpulsing <300 ohms N/A N/A N/A
High DC loop resistance Ground start
ˇ
S 30k ohms;
loop start
ˇ
S 5M ohms
N/A N/A N/A
Ring detection 17 to 33 Hz
40 to 120 V rms N/A N/A N/A
Line leakage ˇ
S 30k ohms, tip-to-ring,
tip-to-ground, ring-to-ground
N/A N/A
AC induction rejection 10V rms, tip-to-ring,
tip-to-ground, ring-to-ground N/A N/A
Note 1: Selected in software.
Note 2: Selected by jumper strap settings on card. Refer to Table 255 "Jumper strap settings
- factory standard (NT8D14BA, NT8D14BB)" (page 698),Table 256 "Jumper strap settings -
extended range (NT8D14BA, NT8D14BB, NT8D14BB Release 10 and up)" (page 698), and Table
257 "Trunk types - termination impedance and balance network (NT8D14BA, NT8D14BB)" (page
699) for details.
Note 3: Loopstart answer supervision introduced with vintage BA cards and Release 19 software.
Note 4: For loop extender application, the maximum voltage applied between tip and ring is –105 V
±5%. The minimum DC loop resistance for this type of application is 1800 ohms.
Electrical characteristics of the Universal TrunkCard are listed in Table 236"Universal TrunkCard electrical characteristics" (page 680).
Table236
Universal TrunkCard electrical characteristics
Characteristic DID trunk CO trunk
Terminal impedance 600 or 900 ohms (selected by
software) 600 or 900 ohms (selected by
software)
Signaling range 2450 ohms 1700 ohms
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.