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19 Appendix
85
ARGUS Copper Box
I
I
Electric current
IDC
DC current
ISDN
Integrated Services Digital Network
Iso.
Isolation resistance measurement
L
LCL
Longitudinal conversion loss
M
m
Meter
max
Maximum
min
Minimum
N
NEXT
Near-end crosstalk
NTBA
Network termination for ISDN basic rate access
O
opt.
Optional
P
PPA
Passive test termination
Pol.
Polarity
POTS
Plain Old Telephone Service (PSTN)
Q
QR
Quick response
R
R
1. Resistance (electrical resistance)
2. Ring (b-wire)
Ra
Resistance a-wire
Rb
Resistance b-wire
Rem.
Remote (instrument kit control)
RC
Resistance (R) and capacitance (C)
RE
Ground resistance
Ri
Internal resistance
Ring
b-wire
RoHS
Restriction of Hazardous Substances
Rs
Loop resistance
R
Sym
Resistance symmetry
S
S/N
Serial number
SHDSL
Single-Pair High-speed Digital Subscriber Line
Sig.
Signatures
Sym
Symmetry
T