T1/E1 Clock Selector and Amplifier0 pages

Clock Selector/Distribution Amplier
Model 8144
•

Timing Failure Detection Automates
Switchover to Backup Source

•

Double Input (Selector/Distribution Amplier)
or Single Input (Distribution Amplier)

•

Twelve Distribution Outputs

•

User Congurable with Switch Parameters,
Alarm Latching,

•

Bridging of Inputs, DS1 Line Build Out, and
DS1 Outputs D4 or ESF

•

5-Year Limited Warranty

1

The Spectracom Model 8144 Clock
Selector/Distribution Amplier detects
failure of input clock and provides manual
or automatic switchover between two clock
sources. The selected input is distributed via
twelve buffered output line drivers.

Performance Specications
Clock Outputs:
Twelve individually buffered DS1 framed all
ones, (optionally RS-485 or E1) derived fromt
he selected input. DS1’s may be set for ESF or
D4 framing and LBO to 655 feet.

Clock Inputs:
Two DSI’s, with D4 or ESF framing (optionally
RS-485 or E1). Selectable bridging or terminating input impedance

Reference Switching:
Normally non-revertive, but may be set to give
priority to Input Channel A. Switchover occurs
with Loss of Signal (LoS) or Alarm Indication
Signal (AIS) at the selected reference input;
when an external alarm is sensed; or when
manual selection is made.

Alarm Outputs:

External Alarm Inputs:

Temperature:

One for each input channel; grounding or RS422/485 level activation. Activates switchover
and alarm outputs.

Major & minor alarms, A & B input ready, A or
B input selected

Power:
115/230 VAC 15%, 50/60 Hz; 15 W
(standard)
12-24 VDC Option: 11 to 32 VDC; 12 W
48 VDC Option: 55.2 VDC 20%; 12 W
DC options provide dual fused inputs and
reverse polarity protection

Physical & Environmental
Size: EIA 19” rack W x 3.5’H x 10”D
Weight: 6 lbs. maximum
Connectors:
Clock I/O: Pluggable terminal strip
Alarm I/O: Pluggable terminal strip
AC power: 3-prong connector, 7’ cord included
DC power: Terminal strip

Humidity: 95% R.H. non-condensing

Ordering Information
Cong.

Inputs

Outputs

8144-DD
8144-DR
8144-RD
8144-EE
8144-ER
8144-RE
8144-RR

DS1
DS1
RS-422/485
E1
E1
RS-422/485
RS-422/485

DS1
RS-422/485
DS1
E1
RS-422/485
E1
RS-422/485

Specify Model 8144, I/O conguration, and:
Option 11 for rack slides.
Option 52 for 12-24 VDC power.
Option 54 for 48 VDC power.
1

The warranty period may be dependent on country.

Switches: Power, manual or automatic mode,
manual input selection

Indicators: Major & minor alarms, A & B input
ready, A or B input selection

Major and minor alarms activated by LoS, AIS
or external alarm input. Relay contacts SPDT,
2A @ 30 VDC

UK | 6A Beechwood | Chineham Park | Basingstoke, Hants, RG24 8WA | +44 (0)1256 303630 | info@spectracom.co.uk

. . . quality

...

Q

IS

O 9001

.

FRANCE | 3 Avenue du Canada | 91974 Les Ulis, Cedex | +33 (0)1 64 53 39 80 | sales@spectracom.fr

om . . . . .
rp.c

USA | 1565 Jefferson Road, Suite 460 | Rochester, NY 14623 | +1.585.321.5800 | sales@spectracomcorp.com

ctracomco
.spe

..

www.spectracomcorp.com

July 24, 2012- 8144 (F)
Specications subject to change or improvement without notice.
Spectracom is a business of the Orolia Group. ©2010-2012 Orolia USA, Inc.