{"id":20702,"date":"2021-08-17T17:15:00","date_gmt":"2021-08-17T17:15:00","guid":{"rendered":"http:\/\/wordpress.vremya-ch.com\/?p=20702"},"modified":"2026-09-03T07:52:54","modified_gmt":"2026-09-03T07:52:54","slug":"vch-003-en","status":"publish","type":"post","link":"http:\/\/wordpress.vremya-ch.com\/index.php\/en\/products-en\/telecommunic-en\/vch-003-en\/","title":{"rendered":"VCH-003 Synchronization Supply Unit"},"content":{"rendered":"\n
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The VCH-003 Synchronization Supply Unit (SSU) is designed for use in Telecommunications Networks.\nDepending on its configuration, the VCH-003 SSU can be used to generate and distribute 2048 kHz and 2048 kbit\/s synchronization signals as part of a Primary Reference Clock (PRC) system; to operate as a Transit Node Clock (TNC) or Local Node Clock (LNC), recovering synchronization signals derived from transmission lines at network nodes; or to generate synchronization signals using GLONASS\/GPS GNSS references.\n<\/p>\n\n\n\n

Primary Application<\/strong>
synchronization of digital telecommunications networks, SDH.<\/p>\n\n\n\n

Key Features<\/strong>
\n\u2013\twhen used as part of an enhanced Primary Reference Clock (ePRC), the output synchronization signals comply with ITU-T Recommendation G.811.1<\/strong>.
\n\u2013\tWhen operated as a Transit Node Clock (TNC) or Local Node Clock (LNC), the SSU complies with ITU-T Recommendation G.812.
\n\u2013\tReference frequency and UTC time combiner (ITU T G.811.1\/G.8272.1).
\n\u2013\tUp to 8 synchronization inputs: 2048 kHz, 2048 kbit\/s (E1), 1 MHz, 5 MHz, and 10 MHz<\/strong>.
\n\u2013\t1 PPS<\/strong> synchronization input.
\n\u2013\tSynchronization inputs from a PTP Grandmaster (PTP GM)<\/strong>.
\n\u2013\tMulti-band GNSS GLONASS, GPS, BeiDou, GALILEO (L1\/L2,E1\/E5, B1\/B2).
\n\u2013\tSpoofing detection.
\n\u2013\tSynchronization from GNSS<\/strong> signals; in this mode, the output synchronization signal characteristics comply with ITU-T Recommendation G.811<\/strong>.
\n\u2013\tAutomatic validation of input synchronization signals.
\n\u2013\tMonitoring of input signal parameters MTIE, TDEV, dF\/F<\/strong>.
\n\u2013\tTime synchronization via NTP<\/strong> and PTP<\/strong> protocols in Master\/Slave modes, with SyncE<\/strong> support.
\n\u2013\thigh-stability internal quartz crystal (DOCXO) or rubidium oscillator<\/strong>.
\n\u2013\tInternal DOCXO aging (frequency drift) compensation in Holdover mode (DOCXO+ option).
\n\u2013\tAdvanced Direct Digital Synthesis (DDS)<\/strong> technology.
\n\u2013\tUp to 80 outputs with 1:1 redundancy<\/strong>, compliant with ITU-T G.703<\/strong> (balanced interface, 120 \u03a9 load).
\n\u2013\t20 user-configurable outputs per output signal generation module and per output signal distribution module.
\n\u2013\tIndependent configuration of each output: 2048 kHz \/ E1 \/ Off<\/strong>.
\n\u2013\thot-swappable modules.
\n\u2013\tInput signals are connected via universal BNC connectors<\/strong>, while output signals are available through widely used DB9 connectors<\/strong>.
\n\u2013\tFully redundant architecture with 1:1 protection<\/strong>.
\n\u2013\tBypass mode<\/strong>, allowing the VCH-003 to continue operating and provide uninterrupted synchronization signal output even when the oscillator modules are not installed or available.
\n\u2013\tAdvanced signal processing and distribution.
\n\u2013\tContinuous measurement and quality monitoring of input synchronization signals.
\n\u2013\tAnalysis of Synchronization Status Messages (SSM)<\/strong> on input synchronization signals and generation of SSM information in the output E1 stream.
\n\u2013\tGraphical management software.
\n\u2013\tRemote software updates.
\n\u2013\t9U ETSI \/ 19-inch chassis.<\/strong>
\n\u2013\tSSUManager local control\/monitoring software.
\n\u2013\tGlobal multi-user NMS (Linux, PostgreSQL).\n<\/p>\n\n\n\n

Oscillator Options<\/strong>
\nthe customer can select the most suitable oscillator type:\n\u2013\trubidium oscillator \u2014 ITU-T G.812 Type II<\/strong>;
\n\u2013\tdouble-oven quartz crystal oscillator \u2014 ITU-T G.812 Type I<\/strong>.\n<\/p>\n\n\n\n

NTP Functions<\/strong>
\n\u2013\tsynchronization of the local time scale to UTC<\/strong> using a GNSS reference.
\n\u2013\tNTP v3 and NTP v4<\/strong> Network Time Protocol support in accordance with IETF RFC 1305<\/strong> and RFC 5905<\/strong>.
\n\u2013\tStratum 1 NTP server<\/strong>.
\n\u2013\tSupport for up to 50,000 NTP clients<\/strong>.
\n\u2013\tUp to 16 IPv4 addresses per Ethernet port<\/strong>, with VLAN support.\n<\/p>\n\n\n\n

PTP Functions<\/strong>
\n\u2013\tPrecision Time Protocol PTPv2 (IEEE 1588v2)<\/strong>.
\n\u2013\tInputs: antenna GNSS, external 1PPS, PTPv2 slave.
\n\u2013\tPTP operation in Master and Slave modes<\/strong>.
\n\u2013\tSynchronous Ethernet (SyncE)<\/strong> support in accordance with ITU-T G.8261<\/strong>, as well as ESMC message transmission.
\n\u2013\tOne RJ-45 and one isolated SFP ports (1000BASE-X) on each GNSS card.
\n\u2013\tConfiguration of up to 16 IPv4 addresses per Ethernet port<\/strong>, VLAN support, and simultaneous operation of multiple PTP profiles.
\n\u2013\tIn Master mode, synchronization of the local time scale to UTC<\/strong> using a GNSS reference.
\n\u2013\tInternal time-scale resolution: 5 ns<\/strong>.
\n\u2013\tUp to 1,024 PTP clients<\/strong> at a synchronization message rate of 128 packets per second<\/strong>.
\n\u2013\tPTP message addressing modes: multicast, unicast, or mixed<\/strong>.
\n\u2013\tPTP message transmission: Ethernet (L2), UDP(L3, IPv4).
\n\u2013\tTimestamping modes: one-step or two-step<\/strong>.
\n\u2013\tDelay measurement mechanisms: end-to-end (E2E)<\/strong> or peer-to-peer (P2P)<\/strong>.
\n\u2013\tSupported profiles:
\n\u2022\tFrequency synchronization \u2014 ITU-T G.8265.1 (unicast, L3)<\/strong>;
\n\u2022\tPhase\/time synchronization \u2014 ITU-T G.8275.1 (multicast, L2, syncE)<\/strong>;
\n\u2022\tPhase\/time synchronization \u2014 ITU-T G.8275.2 (unicast, L3, syncE)<\/strong>;
\n\u2022\tUser-defined profiles.\n<\/p>\n\n\n\n

Technical Specifications<\/strong>
\nInterfaces<\/strong>: RS-232C, USB, LAN.
\nPower supply<\/strong>: 36\u201372 V DC, dual power inputs.
\nPower consumption<\/strong>: max. 76 W; 130 W during warm-up.
\nDimensions (W \u00d7 H \u00d7 D)<\/strong>: 483 \u00d7 399 \u00d7 302 mm.
\nMounting<\/strong>: 19-inch rack.
\nWeight<\/strong>: 5 kg.\n\n<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"

The VCH-003 Synchronization Supply Unit (SSU) is designed for use in Telecommunications Networks. Depending on its configuration, the VCH-003 SSU can be used to generate and distribute 2048 kHz and 2048 kbit\/s synchronization signals as part of a Primary Reference Clock (PRC) system; to operate as a Transit Node Clock (TNC) or Local Node Clock […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[70],"tags":[],"_links":{"self":[{"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/posts\/20702"}],"collection":[{"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/comments?post=20702"}],"version-history":[{"count":20,"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/posts\/20702\/revisions"}],"predecessor-version":[{"id":20779,"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/posts\/20702\/revisions\/20779"}],"wp:attachment":[{"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/media?parent=20702"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/categories?post=20702"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wordpress.vremya-ch.com\/index.php\/wp-json\/wp\/v2\/tags?post=20702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}