OSA 5533C SDU

Synchronization Distribution Unit

OSA 5533C SDU
OSA 5533C SDU
Functional Diagram

 

 

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Features

The steady expansion and growth of telecommunication services has resulted in the implementation of complex networks. These often contain a large number of network elements requiring proper synchronization to ensure a smooth network operation with the required quality of service. Further growth results in additional output capacity being required at the network nodes to synchronize the supplementary elements and thus makes it necessary to implement expansion synchronization equipment. To meet this requirement, Oscilloquartz proposes its compact Synchronization Distribution Unit: OSA 5533C SDU.

  • Synchronisation Distribution Unit with holdover capability
  • Input signals: single or dual synchronisation inputs
  • Output signals: up to 64 synchronisation outputs
  • Re-timing function: up to 24 E1 or T1 traffic carrying signals
  • Holdover capability: Compliant to ITU-T G.812 SSU (Type III) requirements
  • Full support of SSM on E1/T1, both on inputs and outputs
  • Wide choice of output interfaces (2.048 Mbit/s (E1), 1.544 Mbit/s (T1), 64/8 kbit/s Composite Clock (CC), 2.048/5/10 MHz
  • Output protection: protected (1:1) and unprotected mode.
  • Wide choice of connectors and impedances
  • Fully manageable, both locally (RS-232) via Local Manager SW and remotely (10BaseT Ethernet) via SyncView™ Management SW
  • Fully maintenance-free operation


Applications

  • The OSA 5533C SDU provides a very economical and reliable solution to the distribution of synchronization references to network elements, such as switches, cross-connects and multiplexers.
  • The OSA 5533C SDU provides up to 48 or 64 outputs referenced to the selected input or to the Holdover Unit. 1:1 card protection is available as an option for all output cards.
  • With the OSA 5533C SDU it is also possible to re-time up to 24 traffic-carrying signals. The OSA 5533C SDU is ideally suited to stand-alone clock distribution requirements in all SDH or SONET nodes where a stable reference is available.
  • The equipment can be configured with single or dual inputs and it accepts references such as E1, T1 or various frequencies (2.048/1.544/1/5/10MHz.)
  • The OSA 5533C SDU fully supports Synchronization Status Messaging (SSM) to implement self-healing synchronization networks.

The steady expansion and growth of telecommunication services has resulted in the implementation of complex networks. These often contain a large number of network elements requiring proper synchronisation to ensure a smooth network operation with the required quality of service.

Further growth results in additional output capacity being required at the network nodes to synchronise the supplementary elements and thus makes it necessary to implement expansion synchronisation equipments.

To meet this requirement, Oscilloquartz proposes its compact Synchronisation Distribution Unit OSA 5533C SDU.

 

HOLDOVER FUNCTION OUTPUT & RE-TIMING
A highly functional Hold-over Unit (HOU) ensures that the OSA 5533C SDU continues to deliver output references even when all inputs are lost.

The HOU contains an oven controlled crystal oscillator with a stability better than 5E-10/day, exceeding the requirements of ITU-T G.812 SSU (Type III).

Moreover, the HOU ensures hitless input switchover and maintains output phase changes within the limits specified in G.812.

 The OSA 5533C SDU can provide both synchronisation distribution and traffic re-timing, avoiding the need for separate equipment (and additional management connections).

It can provide up to 64 output synchronisation signals of telecom formats (E1, T1, and/or various frequencies), up to 24 E1/T1 re-timing channels or a combination of outputs and re-timing.

 

FULL SSM MANAGEMENT MANAGEMENT SECTION
The OSA 5533C SDU can effectively be employed in self-healing synchronisation networks thanks to its full implementation of Synchronisation Status Message (SSM) management. The OSA 5533C SDU is manageable in three different ways:

- Locally, through the RS-232 port using the OSA Local Manager for 5533C, a graphical, intuitive, windows-based application.

- Remotely, through the RS-232 port and modem/LAN connection, using the same Local Manager coupled with the OSA Remote Access Manager (RAM) software.

- Remotely, through TCP/IP connection to the network management center, using Oscilloquartz’ renowned synchronisation management system SyncView™.

 

TECHNICAL SPECIFICATIONS

Physical dimensions (H×W×D):

- ETSI: 6U (266 × 535 × 240) mm
- 19“: 3U (133 × 483 × 270) mm

Power:

Up to 2 power supplies in any combination of:
- 36-72 VDC
- 150-265 VAC
- 65-132 VAC

Input signals:

Up to 2 synchronisation inputs chosen among¹:
- 2.048 MHz
- 2.048 Mbit/s (E1)
- 1.544 Mbit/s (T1)
- 64kHz
- 1 MHz
- 1.544 MHz
- 5 MHz
- 10 MHz

Output signals:

Up to 64² unprotected / 32 protected outputs selectable in groups of 16 among:
- 2.048 MHz
- 2.048 Mbit/s (E1)
- 1.544 Mbit/s (T1)
- 64/8 kbit/s Composit Clock (CC)
- 5MHz
- 10MHz

Re-timing:

Retiming of up to 24 traffic-carrying E1/Tl signals.

Management:

- Local Manager through RS-232C connection
- Remotely manageable through RS-232C + modem via RAM for Local Manager (see separate Remote Access Manager datasheet
- Remotely manageable through 10BaseT Ethernet interface via the OSA SyncView™ synchronisation management system

Holdover Unit (HOU):

- Based on OSA OCXO 8741
- Long term stability: < ±5E-10/day
< ±1E-7/year

1. E1 input/output cards cannot be mixed with T1 or CC input/output cards in the same equipment
2. For certain types of connectors, max. no of outputs is 48