Nortel Networks Circuit Card 311 - Manual (Page 134)

134 NT1R20 Off-Premise Station Analog Line card
impedance at the TIMP and BIMP prompts, respectively. See Software
Input/Output Reference — Maintenance (NN43001-711) for LD 10 service
change instructions.
Individual line interface units on the NT1R20 OPS Analog Line Card are
configured to either OPS (for OPS application) or On-premises Station
(ONS) (for ONS application) Class of Service (CLS) in the Single-line
Telephone Administration program LD 10.
LD 10 is also used to select unit terminating impedance and balance
network impedance at the TIMP and BIMP prompts, respectively. See
Software Input/Output Reference — Administration (NN43001-611) for LD
10 service change instructions.
Port-to-port loss configuration
The loss plan for the NT1R20 OPS analog line card determines port-to-port
loss for connections between an OPS analog line card unit (port) and other
ports.
The transmission properties of each line unit are characterized by the OPS
or ONS class of service assigned in the Analog (500/2500-type) Telephone
Administration program LD 10.
The OPS analog line card provides transmission loss switching for control of
end-to-end connection loss. Control of loss is a major element in controlling
transmission performance parameters such as received volume, echo,
noise, and crosstalk. The loss plan for the OPS analog line card determines
port-to-port loss for connections between an OPS analog line card unit (port)
and other IPE ports. LD 97 is used to configure systems for port-to-port loss.
See Software Input/Output Reference — Administration (NN43001-611) for
LD 97 service change instructions.
The transmission properties of each line unit are characterized by the
OPX or ONP class-of-service assigned in the Analog (500/2500-type)
Telephone Administration program (LD 10). A complete loss plan is given in
Transmission Parameters Reference (NN43001-282) where the appropriate
port-to-port electrical loss may be determined for connections between any
two Meridian 1 ports (lines, analog trunks, or digital trunks).
Table 63
OPS analog line card - cable loop resistance and loss
Cable loop loss (dB)
(non-loaded at 1kHz) Cable loop resistance (ohms)
Cable length 26 AWG 24 AWG 22 AWG 26 AWG 24 AWG 22 AWG
847 m (2800 ft) 1.5 1.2 0.9 231.4 144.2 90
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.