{"id":946,"date":"2016-03-29T14:06:31","date_gmt":"2016-03-29T12:06:31","guid":{"rendered":"https:\/\/bergs.biz\/blog\/?p=946"},"modified":"2016-03-30T12:37:01","modified_gmt":"2016-03-30T10:37:01","slug":"genexis-fibertwist-p2410-dissected","status":"publish","type":"post","link":"https:\/\/bergs.biz\/blog\/2016\/03\/29\/genexis-fibertwist-p2410-dissected\/","title":{"rendered":"Genexis FiberTwist-P2410 dissected"},"content":{"rendered":"

By chance I got an early hands-on on a fiber network terminator (NT)\/broadband gateway (such a device will soon be installed for my FTTH line provided by “Deutsche Glasfaser<\/a>.”) I don’t know how it happened, but it suddenly fell apart, so I had a brief look under the hood… \ud83d\ude00<\/p>\n

\"IMG_0673\"<\/a>
Genexis FiberTwist-P2410 inside view<\/figcaption><\/figure>\n

The SoC is a Lantiq PXB 4369 EL V2.1 (GRX300), which is a Gigabit Ethernet Router\/Gateway SoC with int. 2×2 WiFi. There aren’t any antennas, though, and it seems you can’t add any either. The device is from the GRX 300 series, which is a “CPE Network Processor with integrated WiFi.”<\/p>\n

A Russian web site states that its actually the GRX369 series, and that the SoC is clocked with 600 MHz. (Update<\/strong>: The CPU is a MIPS 34Kc V5.6 clocked at 600 MHz, 397.82 BogoMIPS.)<\/p>\n

The device can be simply twisted on the wall junction box<\/a> which is the provider’s fiber hand-over point (“fiber management unit,” FMU.)<\/p>\n

On the WAN side we have a Mentech FGE20-N9C-35S as the optical transceiver module (2×5 form factor) for single-mode fiber in passive optical networks<\/a> (PON). Optical wavelength division multiplexing (WDM) is used so a single fiber can be used for both downstream and upstream data. The maximum data rate this\u00a0transceiver can handle is 1.25 Gbit\/s (which suggests we’re talking EPON,\u00a0802.3ah-2004 here…). The reach without intermediate amplification is 20 km(!). Wavelengths of 1,310 nm (upstream)\/1,490 nm (downstream) are used.<\/p>\n

For LAN connectivity the gateway has 4 Gigabit Ethernet ports, driven by two FPE LG48204DH 2-port LAN transformer modules in a DIP-48 package.<\/p>\n

The transceiver is a Marvell 88E1512-NNp2<\/a> out of the “Alaska<\/a>” series, 10\/100\/1000 BASE-T single-port PHY (so it seems that all fiber\/Ethernet ports are on the same switch), supporting Energy Efficient Ethernet (EEE) and Advanced Virtual Cable Tester functionality.<\/p>\n

Update<\/strong>: The switch seems to be a Lantiq VRX318 (or compatible).<\/p>\n

Firmware is stored in a Elite Semiconductor (ESMT) F59L1G81LA-25T<\/a> single-level serial (SPI) NAND flash chip in a TSOP48 package. It operates with 3.3V at a clock of 25 ns and has a flash density of 1 Gbit and a bus width of 8 bits. The total memory size is 128 MByte.<\/p>\n

RAM is provided by a Winbond W971GG6SB<\/a>-25 chip, which is a DDR2-800 (5-5-5) SDRAM chip with a size of 128 MByte, operating at transfer rates of 800 Mbit\/s per pin with a power supply of 1.8 V. (Update<\/strong>: The RAM is actually clocked at 300 MHz.)<\/p>\n

It seems that the broadband gateway is equipped with a serial-console connector.<\/p>\n

Here’s another photo that shows where the key components are located:<\/p>\n

\"Genexis<\/a>
Genexis FiberTwist-P2410 with key components<\/figcaption><\/figure>\n

Please let me know if this in any way helps you, or you can contribute to this post.<\/p>\n","protected":false},"excerpt":{"rendered":"

View inside Genexis FiberTwist-P2410 and description of main components used.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[224,151,223,222,225],"class_list":["post-946","post","type-post","status-publish","format-standard","hentry","category-networking-computers","tag-fiber","tag-glasfaser","tag-netzabschluss","tag-ont","tag-pon"],"_links":{"self":[{"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/posts\/946","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/comments?post=946"}],"version-history":[{"count":16,"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/posts\/946\/revisions"}],"predecessor-version":[{"id":982,"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/posts\/946\/revisions\/982"}],"wp:attachment":[{"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/media?parent=946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/categories?post=946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bergs.biz\/blog\/wp-json\/wp\/v2\/tags?post=946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}