{"id":3347,"date":"2025-12-08T00:00:00","date_gmt":"2025-12-08T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/xlaui-vs-xlppi-40g-electrical-interface-comparison\/"},"modified":"2026-06-22T04:14:52","modified_gmt":"2026-06-22T04:14:52","slug":"xlaui-vs-xlppi-40g-electrical-interface-comparison","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/it\/knowledge-center\/xlaui-vs-xlppi-40g-electrical-interface-comparison","title":{"rendered":"XLPPI rispetto a XLAUI spiegato: interfacce elettriche per moduli QSFP"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2e2d466bb30d4bea9b595f0115996a62.webp\" alt=\"XLPPI vs. XLAUI\" class=\"wp-image-3340\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2e2d466bb30d4bea9b595f0115996a62.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2e2d466bb30d4bea9b595f0115996a62-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2e2d466bb30d4bea9b595f0115996a62-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2e2d466bb30d4bea9b595f0115996a62-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2e2d466bb30d4bea9b595f0115996a62-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ne sistemi Ethernet ad alta velocit\u00e0, le interfacce elettriche determinano come i dati fluiscono tra un dispositivo host e un trasmettitore\/ricevitore ottico. Due interfacce ampiamente citate nelle architetture di rete 40G e 100G sono<br> <strong>XLPPI<br><\/strong> and <strong>XLAUI<\/strong>. Sebbene possano apparire simili in superficie\u2014entrambe definiscono una segnalazione elettrica multi-lane\u2014esse svolgono<br> <strong>scopi diversi<br><\/strong>, provengono da<br> <strong>organismi di standardizzazione diversi<br><\/strong>, e supportano<br> <strong>generazioni di prestazioni diverse<br><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Questo articolo fornisce un confronto strutturato e autorevole tra<br> <strong>XLPPI e XLAUI<br><\/strong>, chiarificando il ruolo di ciascuna interfaccia negli attuali ecosistemi di moduli ottici, in particolare nei<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26153-40g-qsfp.htm\">QSFP+<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491591.htm\">QSFP28<\/a>, and <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473139.htm\">QSFP56<\/a> moduli ampiamente distribuiti nei data center.<br>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Le fondamenta: IEEE 802.3ba e l\u2019architettura 40G<br><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"721\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3426d25714404c1993f09e9f21abe054.webp\" alt=\"IEEE 802.3ba standard\" class=\"wp-image-3341\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3426d25714404c1993f09e9f21abe054.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3426d25714404c1993f09e9f21abe054-300x180.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3426d25714404c1993f09e9f21abe054-1024x615.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3426d25714404c1993f09e9f21abe054-768x461.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3426d25714404c1993f09e9f21abe054-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Prima di analizzare le differenze, dobbiamo comprendere il terreno comune. Entrambe le interfacce XLAUI e XLPPI sono definite nell\u2019ambito dello standard<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/knowledge-center\/what-is-ieee-802-3ba-standard\/\"><strong>IEEE 802.3ba<\/strong> cavi in rame standard<\/a> per Ethernet a 40 Gigabit.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La sigla \u201cXL\u201d in entrambi gli acronimi rappresenta il numero romano per 40. Entrambe le interfacce utilizzano un\u2019architettura parallela a<br> <strong>4 lane<br><\/strong>, dove ogni lane opera a<br> <strong>10,3125 Gbps<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Larghezza di banda totale:<br><\/strong> 41,25 Gbps (incluso l\u2019overhead della codifica 64b\/66b).<br>.<\/p><\/li><li><p><strong>Velocit\u00e0 effettiva dei dati:<br><\/strong> 40 Gbps.<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuttavia, \u00e8 nella collocazione all\u2019interno della gerarchia del livello fisico (PHY) OSI che esse divergono.<br>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Cos\u2019\u00e8 XLAUI? (Interfaccia unit\u00e0 di collegamento 40G)<br><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd32dba2684e4869a0a76d8a1ab143eb.webp\" alt=\"What Is XLAUI? (40G Attachment Unit Interface)\" class=\"wp-image-3342\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd32dba2684e4869a0a76d8a1ab143eb.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd32dba2684e4869a0a76d8a1ab143eb-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd32dba2684e4869a0a76d8a1ab143eb-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd32dba2684e4869a0a76d8a1ab143eb-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cd32dba2684e4869a0a76d8a1ab143eb-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/glossary\/xlaui-10-lane-attachment-unit-interface-ethernet-explained\/\"><strong>XLAUI (Interfaccia unit\u00e0 di collegamento 40G)<br><\/strong><\/a> \u00e8 un\u2019interfaccia elettrica definita dall\u2019IEEE introdotta nello standard<br> <strong>IEEE 802.3ba<\/strong> per la <strong>Ethernet a 40 Gigabit (40GbE)<\/strong>. Opera utilizzando:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>4 corsie elettriche<\/strong><\/p><\/li><li><p><strong>10,3125 Gbps per lane<br><\/strong><\/p><\/li><li><p><strong>codifica di linea 64B\/66B<br><\/strong><\/p><\/li><li><p><strong>segnalazione NRZ<br><\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 Finalit\u00e0 di XLAUI nell\u2019Ethernet 40G<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">XLAUI funge da collegamento elettrico interno tra:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>MAC \u21c6 PHY<br><\/strong><\/p><\/li><li><p><strong>MAC \u21c6 PMA\/PMD<br><\/strong><\/p><\/li><li><p><strong>PHY \u21c6 motore ottico interno (nelle piattaforme con ottica fissa)<br><\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Non viene utilizzata direttamente all\u2019interfaccia del modulo inseribile. Piuttosto, XLAUI fa parte del percorso di segnale interno di switch, router e schede di rete.<br>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 Dove viene utilizzata XLAUI<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">XLAUI \u00e8 associata principalmente a:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/482754.htm\"><strong>40GBASE-SR4<\/strong><\/a><strong> (fibra MPO-12)<br><\/strong><\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/482754.htm\"><strong>40GBASE-LR4<br><\/strong><\/a><strong> (WDM a 4\u00d710G \u03bb)<br><\/strong><\/p><\/li><li><p><strong>40GBASE-CR4 (cavi DAC)<br><\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Sebbene questi moduli utilizzino quattro lane da 10G, l\u2019interfaccia XLAUI \u00e8 tipicamente implementata<br> <strong>all\u2019interno dell\u2019host<br><\/strong>, non al connettore QSFP+.<br>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Cos\u2019\u00e8 XLPPI? (Interfaccia parallela estesa a bassa potenza\/bassa tensione)<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9cd1ef29cc8048e184bfce71116e12dd.webp\" alt=\"What Is XLPPI? \" class=\"wp-image-3343\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9cd1ef29cc8048e184bfce71116e12dd.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9cd1ef29cc8048e184bfce71116e12dd-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9cd1ef29cc8048e184bfce71116e12dd-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9cd1ef29cc8048e184bfce71116e12dd-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9cd1ef29cc8048e184bfce71116e12dd-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/knowledge-center\/xlppi-electrical-interface-in-40g-qsfp-plus-modules-explained\/\"><strong>XLPPI<br> <\/strong><\/a><strong>(Interfaccia parallela a bassa potenza\/bassa tensione estesa)<\/strong> \u00e8 un\u2019interfaccia elettrica definita dall\u2019MSA utilizzata tra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Host PHY\/ASIC \u21c6 Moduli ottici pluggable della famiglia QSFP<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A differenza di XLAUI (limitata a 40G), XLPPI copre <strong>pi\u00f9 generazioni Ethernet<\/strong> e pi\u00f9 fattori di forma QSFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Velocit\u00e0 supportate e modulazione<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">XLPPI supporta:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"width: 111px;\"\/><col style=\"width: 152px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Generazione Ethernet<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Tipo di modulo<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"111\"><p>Lanes<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"152\"><p>Velocit\u00e0 per lane<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Modulazione<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>40G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/482754.htm\">QSFP+<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"111\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"152\"><p>10G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>NRZ<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>100G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491587.htm\">QSFP28<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"111\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"152\"><p>25G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>NRZ<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>200G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473139.htm\">QSFP56<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"111\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"152\"><p>50G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>trasmettitore PAM4<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>400G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472016.htm\">QSFP-DD<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"111\"><p>8<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"152\"><p>50G PAM4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>trasmettitore PAM4<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>800G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>QSFP-DD800<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"111\"><p>8<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"152\"><p>PAM4 da 100 G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>trasmettitore PAM4<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Finalit\u00e0 di XLPPI<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">XLPPI garantisce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Segnalazione parallela a bassa tensione e bassa potenza<\/p><\/li><li><p>Connettivit\u00e0 elettrica ad alta velocit\u00e0 affidabile tra host e modulo<\/p><\/li><li><p>Compatibilit\u00e0 tra tutte le generazioni QSFP<\/p><\/li><li><p>Funzionamento stabile su tracce PCB corte con rigorosi requisiti di integrit\u00e0 del segnale (SI)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ci\u00f2 rende XLPPI l\u2019interfaccia elettrica dominante dietro le moderne ottiche pluggable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >XLPPI vs. XLAUI \u2014 Differenze chiave<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9302b83d121c4c5c9a0967b7511658c7.webp\" alt=\"XLPPI vs. XLAUI\" class=\"wp-image-3344\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9302b83d121c4c5c9a0967b7511658c7.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9302b83d121c4c5c9a0967b7511658c7-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9302b83d121c4c5c9a0967b7511658c7-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9302b83d121c4c5c9a0967b7511658c7-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9302b83d121c4c5c9a0967b7511658c7-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Le due interfacce operano in parti diverse dell\u2019architettura Ethernet e perseguono obiettivi progettuali diversi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Diversi organismi di standardizzazione<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 168px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"168\"><p>Interfaccia<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Definito da<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ambito principale<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"168\"><p><strong>XLAUI<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/knowledge-center\/what-is-ieee-802-3ba-standard\/\">IEEE 802.3ba<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Interfaccia interna MAC \u21c6 PHY<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"168\"><p><strong>XLPPI<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>QSFP\/QSFP-DD MSA<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Host \u21c6 Modulo ottico pluggable<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">XLPPI \u00e8 strettamente legato alla famiglia QSFP, mentre XLAUI \u00e8 legato ai livelli logici interni dell\u2019Ethernet.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Diversi livelli applicativi<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Livello<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/glossary\/xlaui-10-lane-attachment-unit-interface-ethernet-explained\/\">XLAUI<\/a><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/knowledge-center\/maximizing-network-performance-with-xlppi-electrical-interface\/\">XLPPI<br><\/a><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Posizione dell\u2019interfaccia<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>All\u2019interno di switch\/router<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Al connettore del modulo<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Utenti<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>MAC, PHY, PMA\/PMD<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>ASIC\/PHY \u21c6 Modulo QSFP<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Esposizione agli ingegneri hardware<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Progettazione interna dei circuiti integrati<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Progettazione PCB per transceiver pluggable<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Utilizzo nelle ottiche pluggable<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Indiretto<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Collegamenti punto-punto<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Diverse velocit\u00e0 supportate<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">XLAUI \u00e8 fissata a:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>4 \u00d7 10,3125 Gbps (40G)<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">XLPPI scala da <strong>40G \u2192 800G<\/strong>, a seconda del fattore di forma del modulo e della generazione SerDes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Tecnologie di segnalazione<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 211px;\"\/><col style=\"width: 221px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"211\"><p>Caratteristica<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"221\"><p>XLAUI<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>XLPPI<br><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"211\"><p>Segnalazione<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"221\"><p>NRZ<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/knowledge-center\/what-is-the-difference-between-nrz-and-pam4\/\">NRZ + PAM4<\/a><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"211\"><p>Tensione<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"221\"><p>Standard<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>A bassa tensione \/ ottimizzata per il consumo energetico<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"211\"><p>Ottimizzazione SI<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"221\"><p>Obsoleto<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Avanzata, specifica per QSFP<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"211\"><p>Adattabilit\u00e0 futura<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"221\"><p>No (solo 40G)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u00ec (40G\u2013800G)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >Perch\u00e9 i moderni moduli QSFP utilizzano XLPPI invece di XLAUI<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/399a4d95a67d409e804dd80bb6e79bbd.webp\" alt=\"QSFP Modules\" class=\"wp-image-3345\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/399a4d95a67d409e804dd80bb6e79bbd.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/399a4d95a67d409e804dd80bb6e79bbd-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/399a4d95a67d409e804dd80bb6e79bbd-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/399a4d95a67d409e804dd80bb6e79bbd-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/399a4d95a67d409e804dd80bb6e79bbd-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Poich\u00e9 XLPPI:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Supporta <strong>hot-swappable<\/strong><\/p><\/li><li><p>Ottimizza <strong>consumo energetico<\/strong><\/p><\/li><li><p>Mantiene <strong>integrit\u00e0 del segnale<\/strong> ad alte velocit\u00e0<\/p><\/li><li><p>Si scala a <strong>Trasmissione PAM4<\/strong> richiesta da 200G\/400G\/800G<\/p><\/li><li><p>Rispetta i vincoli meccanici ed elettrici dei connettori QSFP<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tutte le moderne ottiche pluggable\u2014<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\">SFP+<\/a>\/<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">SFP28<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472016.htm\">QSFP+<\/a>\/<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491587.htm\">QSFP28<\/a>,<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473139.htm\"> QSFP56<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472016.htm\">QSFP-DD<\/a>\u2014utilizzano <strong>Interfacce a bassa tensione definite dall\u2019MSA<\/strong>, inclusa XLPPI.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Rilevanza del caso d\u2019uso per i clienti LINK-PP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Per i clienti che selezionano moduli ottici ad alta velocit\u00e0 da <a target=\"_blank\" rel=\"\" href=\"https:\/\/l-p.com\"><strong>LINK-PP<\/strong><\/a>, comprendere XLPPI e XLAUI aiuta a chiarire:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Perch\u00e9 <strong>I moduli QSFP+ e QSFP28 si basano su XLPPI<\/strong><\/p><\/li><li><p>Come le interfacce elettriche influenzano <strong>l\u2019interoperabilit\u00e0 dei moduli<\/strong><\/p><\/li><li><p>Quali tipi di moduli supportano <strong>velocit\u00e0 di lane da 10G, 25G, 50G o 100G<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >XLPPI vs. XLAUI \u2014 Tabella riassuntiva<\/h2>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Categoria<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/knowledge-center\/xlppi-electrical-interface-in-40g-qsfp-plus-modules-explained\/\"><strong>XLPPI<br><\/strong><\/a><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/it\/glossary\/xlaui-10-lane-attachment-unit-interface-ethernet-explained\/\"><strong>XLAUI<\/strong><\/a><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Standard<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>MSA<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>IEEE<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Generazioni Ethernet<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Da 40G a 800G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Solo 40G<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Velocit\u00e0 delle lane<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10G \/ 25G \/ 50G \/ 100G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10G<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Modulazione<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>NRZ e PAM4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>NRZ<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Posizione dell\u2019interfaccia<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Host \u21c6 Modulo inseribile<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>MAC \u21c6 PHY (interno)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Utilizzato in<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/482754.htm\">QSFP+<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491587.htm\">QSFP28<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473139.htm\">QSFP56<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472016.htm\">QSFP-DD<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Silicio interno<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Scalabilit\u00e0 futura<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Alto<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Nessuna<br><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >Considerazioni finali<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sia XLPPI che XLAUI sono componenti critici dell\u2019architettura elettrica Ethernet, ma rispondono a requisiti fondamentalmente diversi. <strong>XLPPI<br><\/strong> \u00e8 l\u2019interfaccia alla base dei transceiver ottici QSFP moderni, che consente reti scalabili, ad alta efficienza energetica e ad alta densit\u00e0, da 40G a 800G. <strong>XLAUI<\/strong>, invece, rimane un\u2019importante interfaccia IEEE nella logica interna dell\u2019Ethernet 40G, ma non viene utilizzata sul connettore del modulo inseribile.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Comprendere queste differenze aiuta gli ingegneri di rete a scegliere l\u2019hardware appropriato e consente alle organizzazioni di garantire stabilit\u00e0 e compatibilit\u00e0 futura attraverso la propria infrastruttura ottica.<\/p>","protected":false},"excerpt":{"rendered":"<p>Comprendere le differenze fondamentali tra le interfacce elettriche XLPPI e XLAUI, il loro funzionamento nei sistemi Ethernet 40G\/100G e quale interfaccia viene utilizzata dai moderni moduli QSFP.<\/p>","protected":false},"author":1,"featured_media":3346,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[18,26],"class_list":["post-3347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-40g-qsfp-transceivers","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/posts\/3347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/comments?post=3347"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/posts\/3347\/revisions"}],"predecessor-version":[{"id":10781,"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/posts\/3347\/revisions\/10781"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/media\/3346"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/media?parent=3347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/categories?post=3347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/it\/wp-json\/wp\/v2\/tags?post=3347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}