ADSL / POTS
Splitter YT-B

Low-cost splitters for separating ADSL and POTS in local exchange

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Fits directly to Tyco QDF-E (Mondragon) terminals

Alternative for expensive rack mounted splitters

Considerable cost savings in materials and assembly work

VESALA

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Testing equipment for telecom professionals since 1968.

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The VESALA YT-B splitter is designed to
separate ADSL (Asymmetric Digital Subscriber
Line) from POTS (telephone) when they are
transmitted on a same wire pair and

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terminated by means of Tyco QDF-E
(Mondragon) MDF technology. The splitter
protects POTS from interference caused by
ADSL signals and equally protects ADSL from
transients generated by, for example, POTS
dialling and ringing, and from impedance
fluctuations like off-hook / on-hook transitions.

Mechanical compatibility

Mechanical structure

Maximum ratings

Electrical compatibility

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Tyco QDF-E -disconnection module.

Non-inflammable ABS enclosure, full length

approx. 73mm (visible part approx.

39mm), width 19mm, height 17.5mm.

Tinned test plug reed connectors. Socket

for Tyco test plug in the rear of the

enclosure (see main image).

Operating voltages ±200V, DC loop current

100mA (no over voltage protection

included)

Complies with Telefónica Required
Specifications GT.ER.E.0.0001.01 (DT-DTI-
BR) Rev. 01 * NOV.2002

HP filter specifications

120nF capacitors (optional)

LP filter specifications

<15

Ω

<0.2dB (distortion <0.5dB)

>20dB (300 - 2000Hz), >15dB (2000 -

3400Hz)

>80k

Ω

(at 25Hz)

Filter type

Additional loop resistance

Pass band insertion loss

Return loss

Ring impedance

Technical specifications

Separating ADSL and POTS

Saving costs with YT-B

The ingenuity of the design of YT-B splitters is

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it they can be plugged into QDF-E terminal
blocks in a local exchange, one by one, as
needed. Ordinary splitters require an operator
to install large splitter racks and equipment
awaiting possible future use. With YT-B only
one terminal block is usually needed for five
subscribers. All this results in considerable
cost savings and allows unparalleled flexibility
when ADSL/POTS usage ratio changes over
time.

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YT-B is easy to install to QDF-E test and
measurement slots - no tools are needed.
The LP and HP filters of YT-B connect to
respective pairs directly via contacts inside the

terminal. Individual filters can be plugged into
terminals adjacent to each other. Each YT-B
requires a space of two pairs from a 10-pair
terminal block. YT-B has symmetric mechanical
shape, which allows best access to neighbouring
terminals and their wire pairs. YT-B sticks out
less than 40mm from the terminal block, which
is an asset compared to bulky competitors.

Manufacturer:

H.VESALA Ltd.

Peräsimentie 1
FIN-03100 NUMMELA, FINLAND
Tel. [phone]
Fax. [phone]
Email: [e-mail]
Web: www.vesala.fi

© H.VESALA Ltd. 4405. Subject to change without notice.

Notes: YT-B is a new product - please consult us for

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availability. All specifications are preliminary. VESALA
is a registered trademark of H.VESALA Ltd, Finland.

Filter operation

YT-B splitter contains 4th order passive low-pass
filter and 1st order high-pass filter. Attached
diagram shows a typical ADSL band insertion
loss curve. Impeccable return loss properties
prevent unwanted POTS echoing.