Data Sheet

Optimux-1551
Fiber Multiplexer for 63E1/84T1 over STM-1/OC-3• STM-1 or OC-3 terminal multiplexer providing access to SDH and SONET networks

Any Traffic over Fiber• Multiplexes 21/42/63 E1 or 28/56/84 T1 data channels over a single link,providing a cost-effective and reliable solution• 1+1 unidirectional SDH/SONET automatic protection for uplink; 1+1 protection
on E1/T1 tributaries• Plug-and-play operability

Optimux-1551 is an STM-1/OC-3
multiplexer that combines high capacity,
operational simplicity, and cost benefits.
Up to 21/42/63 E1 or 28/56/84 T1
tributary channels are mapped into asingle channelized STM-1/OC-3 uplink,

for extending the local loop up to 80 km(50 miles), while creating a transmission
layer fully compatible with regional andnational SDH/SONET networks.

The Access CompanyOptimux-1551
Fiber Multiplexer for 63E1/84T1 over STM-1/OC-3

E1/T1 over SDH/SONET applications aresupported via preset software
configurations for operation inmultinational environments.
All modules, including fans and power
supplies, are hot-swappable, making
Optimux-1551 fully compatible withcarrier-class requirements.
Uplink 1+1 unidirectional redundancy is
supported in compliance with the G.841
and GR-253-CORE standards. Tributarychannel 1+1 protection is provided
through an optional redundant module.
Optimux-1551 is available with a choice ofeither standard coaxial or fiber optic
short/long-haul aggregate uplinkinterfaces.

Three dual-purpose multiplexer cards:
OP-2128, OP-4256 and OP-6384, with
21E1/28T1, 42E1/56T1 and 63E1/84T1
tributary channels respectively, support
transparent data transfer in compliancewith the G.703 recommendation. The TDM
traffic is mapped into SDH/SONET
containers, while retaining full use of the155 Mbps capacity.
An optional station clock card can beinstalled on these cards. When both thestation clock and an external clock areused, the unit’s transmit clock fortransmission over the STS-3/OC-3/STM-1
uplink is locked to the station clock input
source. The input source can be either oneof the E1/T1 tributaries or a dedicatedexternal E1/T1 input.
Compact size and low power consumptionof Optimux-1551 allow easy installation atcustomer premises or in
telecommunication buildings.

Figure 1. Point-to-Point Application

Setup, control, status monitoring, anddiagnostics information can be performed
using one of the following methods:•ASCII terminal connected to the DB-9control port•

Telnet host via the dedicated Ethernetport•

Network management station (NMS)
running RADview-EMS, RAD’sclient-server CORBA-based SNMP
network management application. NMS
is connected via the dedicated
Ethernet port•

RAD’s Web-based remote accessterminal application, via the dedicated
Ethernet port

•TFTP for software update and remoteconfiguration, via the dedicated
Ethernet port.

The unit provides high-quality performancemonitoring of the traffic path, from theSDH/SONET network to the customer
premises, thereby assuring high availability.

Data Sheet

E1 TRIBUTARY CHANNELSSpecifications

Compliance
ITU-T Rec. G.703, G.823, RFC 3895

UPLINK (NETWORK)

Data Rate
2.048 Mbps

Interfaces
Electrical (Coax) – STS-3
Fiber Optic – STM-1/OC-3
Compliance
Bellcore GR-253-CORE,
Bellcore GR-499-CORE, ITU-T G.703,G.707, G.783, G.841, G.957, RFC 3592
Redundancy
1+1Line Rate
155.52 Mbps ±20 ppm
Copper Line AttenuationTypically 12.7 dB at 78 MHz using
RG-59-B/U cable
Copper Impedance75Ω
Connectors
Electrical: BNC
Fiber Optic: ST, SC, FC, SC/APC
Line CodeElectrical: CMIFiber Optic: NRZ scrambled
Specifications and Ranges
See Table 1

Line CodeHDB3 or AMI
Impedance120Ω balanced
75Ω unbalanced
Range
According to ITU-T rec. G.703
Jitter
According to ITU-T rec. G.823
Connectors
Six 64-pin unshielded Telco
T1 TRIBUTARY CHANNELS

Range
According to ITU-T rec. G.703
Jitter
According to ITU-T rec. G.824
Connectors
Six 64-pin unshielded Telco
SUPERVISORY AND MANAGEMENT
PORTS
Control PortInterface: V.24/RS-232
Connector: DB-9, female
Format: asynchronous
Baud rate: 9,6 kbps, 19,2 kbps,38,4 kbps, 57,6 kbps, 115,2 kbps
Ethernet PortInterface: 10/100BaseT
Connector: shielded RJ-45
Mode of operation: autonegotiation,
full/half-duplex

Compliance
ITU-T Rec. G.703, G.824, RFC 3895

ALARM RELAY

Data Rate
1.544 Mbps

Rating60 VDC max or 30 VAC max, at 0.5A max

Line CodeB8ZS or AMI

Input Alarm
10 VDC min, 48 VDC max, at 0.5A max

Impedance100Ω balancedConnector
Dry contact, DB-9 female

Figure 2. Extending SDH/SONET Service to Remote Customers

Optimux-1551
Fiber Multiplexer for 63E1/84T1 over STM-1/OC-3

INDICATORSPower A, B
Green: Power is Ok
Red: Power fault

Uplink
SYNC A/B LOSS (red): Electrical/opticalsignal not present or out-of-frame
detected on uplink (A/B)

Off: No power

AIS A/B (yellow): AIS signal detected onuplink A/B

System
TST (yellow):

SIG (green): Signal detected on therespective uplink card

•On: Unit is in test mode•

Blinking: Downloading software

Channels
SYNC LOSS/AIS (red/yellow):

FLT (red): OP-6384/OP-2128/OP-4256
card is in fault condition
ON A/B (green):•

On: Active OP-6384/OP-2128/OP-4256
card•

Blinking: Auto-baud detect process

Alarm
MAJ (red):•

On: Major Alarm•

Blinking: Major Alarm + ACO buttonpressedMIN (yellow):•On: Minor Alarm•

Blinking: Minor Alarm + ACO buttonpressed•

Red: Loss of signal detected on therespective non-masked channel•

Yellow: AIS signal detected on therespective non masked channel•

Blinking (yellow): The channel ismasked and the LED status for themasked channels’ parameter is set toBlink by the user•

Off: The channel is masked and theLED status for the masked channels’parameter is set to Off by the user ORthe channel is not masked and no Lossof Signal or AIS is detected on therespective channel

DIAGNOSTICS
Uplink and Tributary Links
Local Loopback
Remote Loopback
GENERAL
Power
AC: 100 to 240 VAC (±10%), 50 to 60 Hz
DC: -48 VDC (-40 to -72 VDC)
Power Consumption
AC: 160 VA max, 1.6A max
DC: 70W max, 2A max
PhysicalHeight: 8.9 cm (3.5 in)
Width: 43.5 cm (17.1 in)
Depth: 31.5 cm (12.4 in)
Weight: 8.0 kg (11.0 lb) max.
Environment
Temperature: 0°–55°C (32°–131°F)
Humidity: Up to 90%, non-condensing

Data Sheet

Table 1. Uplink Interface Options
Module Name(OrderingOption)

Wavelength

Fiber Type[nm]
OP-M/CX/155

Transmitter
TypePower Coupled Receiver
into Fiber
Sensitivity

Typical Max. Range

Connector
Type

[μm]

[dBm]

[dBm]

[km]

[miles]-

Copper cable ---135m

443 ftCoax interface
See Note 1

OP-M/SC/85L
OP-M/FC/85L
OP-M/ST/85L

850

62.5/125
multimode

Laser (VCSEL)-14 to -20

-26

2.0

1.2

SC, FC, ST

OP-M/SC/13M
OP-M/ST/13M

1310

62.5/125
multimode

LED-14 to -20

-31

2.0

1.2

SC, ST

OP-M/SC/13L
OP-M/FC/13L
OP-M/ST/13L

1310

9/125 single Lasermode-8 to -15

-31

20

12.4

SC, FC, ST

OP-M/SC/15L
OP-M/FC/15L
OP-M/ST/15L

1550

9/125 single Lasermode-8 to -15

-31

20

12.4

SC, FC, ST

OP-M/SC/13LH
OP-M/FC/13LH
OP-M/ST/13LH

1310

9/125 single Laser (longmodehaul)

0 to -5-3440

24.8

SC, FC, ST

OP-M/SC/15LH
OP-M/FC/15LH
OP-M/ST/15LH

1550

9/125 single Laser (longmodehaul)

0 to -5-3480

49.7

SC, FC, ST

OP-M/SC/SF1

Tx: 1310
Rx: 1550

9/125 single Laser WDM
mode (singlefiber)-8 to -15-29

20

12.4

SC

OP-M/SC/SF2

Tx: 1550
Rx: 1310

9/125 single Laser WDM
mode (singlefiber)-8 to -15

-29

20

12.4

SC

OP-M/SC/SF3

Tx/Rx: 1310

9/125 single Laser (SF3)mode (singlefiber)-8 to -15-27

20

12.4

SC/APC

Notes: 1. For copper cables (coax interface), a range of 135m is attainable when using RG-59 B/U (at 78 MHz, in accordance with the square root frequency law).
2. The ranges specified above were calculated according to the following typical attenuation rates (with a 3 dB margin): 3.5 dB/km for 850 nm multimode 0.4 dB/km for 1310 nm single mode
 0.25 dB/km for 1550 nm single mode

Optimux-1551
Fiber Multiplexer for 63E1/84T1 over STM-1/OC-3

Ordering# Power supply:+ Optical wavelength and transmittertype (not relevant with CX option):

STANDARD CONFIGURATIONS

AC

100 to 240 VAC

OP-1551/6384/48/R/SC/13L/D
OP-1551/6384/AC/R/SC/13L
OP-1551/6384/AC/R/SC/13L/D
OP-1551/6384/48/R/CX/D
OP-1551/6384/STC/AC/R/SC/13L/D

48-48 VDC

CX

AD

100 to 240 VAC power supply
plus redundant -48 VDC power
supplyElectrical interface with coaxial
BNC connectors

131310 nm, multimode LED

13L

1310 nm, single mode,laser diode15L

1550 nm, single mode,laser diode13LH

1310 nm, single mode,
long-haul laser diode

15LH

1550 nm, single mode,
long-haul laser diode85L

850 nm, multimode VCSEL

SF1Transmit 1310 nm,receive 1550 nm

SF2Transmit 1550 nm,
receive 1310 nm

SF31310 nm single wavelength
laser

SPECIAL CONFIGURATIONS
OP-1551/*/$/#/!/?/+/^!

Redundant power supply:
R

Redundant power supply of thesame type

? Uplink connector:

Note: Uplink modules, tributary modules, interface

STST fiber

adaptors and cables are all ordered separately.

SCSC fiber

OP-M/?/+
Uplink interface module (see Table 1)

FCFC fiber

OP-1551-M/*/$
Additional tributary module
Legend* Tributary interface module:Note: For single fiber connection, only SC typeconnectors are available. For 1310 nm multimodeLED option, only SC and ST type connectors areavailable.

2128

21×E1 or 28×T1 links

4256

42×E1 or 56×T1 links

Note: For single-fiber applications, a device with6384

63×E1 or 84×T1 links

the SF-1 connector should always be used opposite

2X2128

Two 2128 modules

the device with the SF-2 connector, and vice versa.

2X4256

Two 4256 modules

The SF-3 connector can be used on both sides of2X6384

Two 6384 modules$ Station clock:STC

Optional station clock

Note: For tributary module redundancy, order twomodules. Each tributary module can be set for
operation with either E1 or T1 channels.

the link.

^Redundant STM-1 uplink(default = single uplink):
D

Redundant uplink for
unidirectional 1+1 protection

Data Sheet

SUPPLIED ACCESSORIESOPTIONAL ACCESSORIESAC power cord(when AC power supply is ordered)

OP-1551-PS/AC
100 to 240 VAC Power Supply

DC adapter plug
(when DC power supply is ordered)

OP-1551-PS/48-48 VDC Power Supply

OP-1551-FT
Fan tray module (one included)OP-A/ADAPTOR/%

RM-36
Hardware for mounting a single
Optimux-1551 in a 19-inch rack

Legend% Patch panel interface:
21BNC/1551 Patch panel with 21 BNC
unbalanced E1 interfaces
28RJ

Patch panel with 28 RJ-45
balanced E1/T1 interfaces

Note: Two CBL-TELCO-TELCO/2M cables areincluded with each patch panel.

CBL-TELCO-OPEN/2M
Adapter cable Telco 64-pin, open-ended,
2m (6.5 ft)

CBL-TELCO-RJ45/2M
Adapter cable Telco 64-pin to 14 RJ-45
connectors, 2m (6.5 ft)
CBL-TELCO-RJ45-CROSS/2M
Adapter cable Telco 64-pin to 14 RJ-45
connectors with cross-connections, 2m(6.5 ft)
CBL-TELCO-TELCO/2M
Adapter cable for balanced interface,
Telco 64-pin to Telco 64-pin, 2m (6.5 ft)
Note: 5 (E1) or 6 (T1) Telco-Telco cables are
required to support all the tributary channels.
Two CBL-TELCO-TELCO/2M cables are included witheach OP-A/ADAPTOR patch panel

Blank Panels
Note: To ensure good ventilation during operation,
all empty slots must be covered by blank panels.

OP-1551-PS-BP
Power supply blank panel
OP-M-BP
Main module blank panelOP-1551-M-BP
Tributary interface module blank panel

Data Sheet
Optimux-1551
Fiber Multiplexer for 63E1/84T1 over STM-1/OC-3

FeatureOP-108L

OP-108/106

OP-134/125

OP-1032/1025

OP-45/45L

UplinkFiber Optic

Fiber Optic

E3, Fiber Optic

Fiber Optic

T3, Fiber Optic

BandwidthOP-1551

OP-1553

Copper,Copper,STM-1/OC-3

STM-1/OC-3

108

108/106

34/25 or 134/125

Proprietary

45155

155

Number oftrunks

4 E1

4 E1/4 T1

16 E1/16 T1

16 E1/16 T1

21 E1/28 T1

21/42/63 E1
28/56/84 T1

3 E3/3 T3

Ethernet
support9999–––

SpecialReduced power

Redundant,

Full bandwidth,

3xGbE User

Ring support

Full redundancy

Full redundancyfeaturesconsumption

Ethernet license
activationinterfaces(Optimux-45)

cost-effective

hot-swappable
uplinks

Card version

Works with

9

Works with––––for LRS-102/

OP-108C(Mbps)

OP-34C/OP-25C

MP-4100

International Headquarters
24 Raoul Wallenberg Street
Tel Aviv 69719, Israel
Tel. 972-3-6458181
Fax 972-3-6498250, 6474436
E-mail market@rad.com

www.rad.com

North America Headquarters
900 Corporate Drive
Mahwah, NJ 07430, USATel. 201-5291100
Toll free 1-800-4447234
Fax 201-5295777
E-mail market@rad.com

Order this publication by Catalog No. 803434

The Access Company

168-100-03/11 (4.0) Specifications are subject to change without prior notice. © 1997–2011 RAD Data Communications Ltd. The RAD name, logo, logotype, and the terms EtherAccess, TDMoIP and TDMoIP Driven,and the product names Optimux and IPmux, are registered trademarks of RAD Data Communications Ltd. All other trademarks are the property of their respective holders.

Table 2. Optimux Comparison Table