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| M |
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| MAC |
Monitoring and Alarms Controller |
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Plug-in module concentrates all alarms in OSA equipment, provides a visual summary of the alarms, relay contacts and an RS232 port for local or remote control.
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| MADDS |
Manual & Automatic Direct Digital Synthesis |
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| ME |
Managed Equipment |
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Equipment that is remotely manageable. |
| MIB |
Management Information Base |
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| MML |
Man-Machine Language |
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| MML server |
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A server application that performs MML requests |
| MRTIE |
Maximum Relative TIE |
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Maximum TIE relative to local reference, e.g. time error measured between output and input of a slave clock. |
| MTIE |
Maximum Time Interval Error |
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Maximum peak to peak phase change |
| MUX |
Multiplexer |
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| N |
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| NE |
Network Element |
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| NEBS |
Network Equipment Building Systems |
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NEBS describes about the environment of a typical United States RBOC Central Office. NEBS is the most common set of safety, spatial and environmental design guidelines applied to telecommunications equipment in the United States.
NEBS was developed by Bell Labs in the 1970s to standardize equipment that would be installed in a central office. The objective was to make it easier for a vendor to design equipment compatible with a typical Regional Bell Operating Company (RBOC) central office (CO). This would result in lower development costs and ease the equipment's introduction into the network. Telcordia now manages the NEBS specifications. |
| NG |
Next Generation |
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| NGN |
Next Generation Networks |
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In NGNs the data of all services, be it real-time services (e.g. voice) or pure data services, are transported as IP packets over a packet switched network infrastructure. Despite the asynchronous nature of the switching or routing of packets, many network element types in NGNs require accurate and stable synchronization supply. Where SDH and SONET are used for transport, traditional synchronization technology is adequate. However, Ethernet technology is now gaining terrain especially in the access and metro domains. |
| NM |
Network Manager |
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Network management level within the SyncView™ hierarchy. |
| NMI |
Network Management Interface |
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| NSM |
Network Synchronisation Management System |
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See also SyncView™. |
| NTP |
Network Time Protocol |
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| O |
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| OCXO |
Oven Controlled Crystal Oscillator |
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Clock oscillator using oven technique, e.g. OCXO 8665. |
| OIU |
Output Interface Unit |
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| ONP |
Open Network Provision |
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| OSA |
Oscilloquartz SA |
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| OSA RAM |
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Oscilloquartz’s Remote Access Manager application. The application allows to access Oscilloquartz’s equipment for management purpose through a telephony network. |
| OUC |
OUtput Card |
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Oscilloquartz