Front and back views of the Z-D250CWA. Note that
in-line filter can be removed from wall-mount housing,
giving subscribers without wall-mount phones an
additional in-line filter.
www.pulseeng.com EX129.A (9/09)
Z-BLOCKER® Z-D250CWA
Dual-Line Wall-Mount Filter
Description
The Z-D250CWA is a compact, dual-line, wall-
mount customer premises equipment (CPE) filter de-
signed to expedite the service delivery and improve
the performance of digital subscriber line (DSL) and
home phoneline network (HPN) services over plain
old telephone service (POTS). The Z-D250CWA
filters all telephones, facsimile (fax) machines, an-
swering machines, and other telephone equipment.
Its filter design electronically isolates the high-speed
DSL and HPN data streams from the voice-band
POTS to provide premium voice quality and optimal
DSL and HPN data rates.
The Z-D250CWA filters both line 1 and line 2 at a
two-line wall jack to reduce crosstalk and interfer-
ence that can occur between lines. The filter also
provides a convenience jack for DSL or HPN con-
nections. The wall-mount filter allows two-line
filtering of both the wall phone and a second phone
device, such as an answering or fax machine.
Applications
Installation of the Z-D250CWA wall-mount filter
is quick and easy. The DSL user simply removes
and disconnects the wall phone, connects and
aligns the Z-D250CWA filter with the mounting
screws of the wall plate, pushes the locking tabs in
place, and reconnects and attaches the wall phone.
The DSL user installs an Excelsus filter into each
telephone line jack in the subscriber’s premises
that contains voice-band equipment devices,
including corded/cordless telephones, answering
machines, fax machines, 56Kb/s and lower rate
modems, automatic dialers, recorder connectors
and satellite television set-top boxes.
The Z-D250CWA dual-line wall-mount filter is
one of many filters manufactured by Excelsus for
subscriber installed digital services within homes,
offices, and hotels. Excelsus is the number one
selling brand of DSL filters worldwide.
Features
● Filters both lines at a two-line wall jack
● Provides ltered connections for up to two
phone devices
● Isolate telephone equipment impedances from
the xDSL and HPN systems
● Blocks xDSL and HPN signals from voice-band
equipment
● Provides a DSL convenience jack for connecting
a DSL modem or HPN device
● Compatible with all major xDSL standards
including ADSL Full Rate (ITU-T G.992.1),
ADSL G.Lite (ITU-T G.992.2), ADSL2 (ITU-
T G.992.3 and .4), ADSL2+ (ITU-T G.992.5 in
analog mode), ADSL2++, VDSL (ITU-TG.993.1),
VDSL2; also V.90 and Metallic Loop
Testing compatible
● UL / CSA 60950, FCC CFR 47 Part 68, and IC
CS-03
12220 World Trade Drive, San Diego, CA 92128 USA
Direct: 858 674 8100, Fax: 858-385-8003
www.excelsus-tech.com
Specifications subject to change without notice. Excelsus is a registered trade mark of Pulse Engineering, Inc.
© 2009 Pulse Engineering, Inc. EX129.A (9/09)
Z-BLOCKER® Z-D250CWA
Dual-Line Wall-Mount Filter
Capacitance to Ground <0.2nF
DC Resistance
Network port at 20mA <20 Ω
Tip and Ring to Ground at ≤ 100 Vdc >500 MΩ
Tip and Ring to Ground at ≥ 100 Vdc and ≤ 200 Vdc >500 MΩ
Operating Current 5 to 90 mA
Operating Voltages
Network tip to ring 0 to -100 Vdc
Network ringing signals at 30 to 115 Vrms –100 to +100 Vdc
On-hook Voice Band Insertion Loss at 1004Hz
With 1 lter -0.5dB to 2.2dB
With 3 lters -1.0dB to 6.5dB
With 5 lters -1.0dB to 6.5dB
On- or Off-hook Envelope Delay 300 Hz - 2800 Hz <250μs
Off-hook Voice Band Insertion Loss at 1004Hz
With 1 lter -0.5dB to 0.5dB
With 3 lters -1.0dB to 1.0dB
With 5 lters -1.0dB to 1.0dB
Off-hook Voice Band Insertion Loss Distortion
With 1 lter, 200 to 3400 Hz -1.0dB to 0.5dB
With 3 lters, 200 to 3400 Hz -1.5dB to 2.5dB
With 5 lters, 200 to 3400 Hz -1.5dB to 2.5dB
With 1 lter, 3.4 to 4 kHz -1.5dB to 1.0dB
With 3 lters, 3.4 to 4 kHz -2.0dB to 3.5dB
With 5 lters, 3.4 to 4 kHz -2.0dB to 3.5dB
Off-hook impedance distortion (5 lters)
Phone Port SRL Low ≥13 dB
ERL ≥6.5 dB
SRL High ≥1 dB
Network Port SRL Low ≥12 dB
ERL ≥10 dB
SRL High ≥5 dB
Inter-Modulation Distortion Second and Third order products ≥57 dB and ≥60 dB, respectively
Off-hook High Band Stopband Attenuation (1 lter)
25 kHz to 50 kHz, between 20 and 90 mA ≥17 dB
50 kHz to 12 MHz, between 20 and 90 mA ≥25 dB
Bridging Loss
With 1 lter, 25 kHz to 1.2 MHz ≤0.5 dB
With 5 lters, 25 kHz to 1.2 MHz ≤1.25 dB
With 1 lter, 1.2 to 12 MHz ≤3.0 dB
With 5 lters, 1.2 to 12 MHz ≤4.0 dB
Connectors: Two RJ11 jacks for Phone connections, One RJ11 jack for DSL/HPN connection, and one RJ11 plug on a 4” cord for Line connection
Dimensions: Height = 4.5in (114mm), Width = 3.0in (76.2mm), Depth = 0.91in (23.1mm)
Weight: approx. 80g
UL / CSA 60950, FCC CFR 47 Part 68, and IC CS-03
Z-BLOCKER Z-D250P2J Filter Specifications
