{"id":5128,"date":"2025-09-10T00:00:00","date_gmt":"2025-09-10T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/qsfp-plus-40g-er4-long-distance-high-speed-networking\/"},"modified":"2026-06-22T09:12:37","modified_gmt":"2026-06-22T09:12:37","slug":"qsfp-plus-40g-er4-long-distance-high-speed-networking","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/qsfp-plus-40g-er4-long-distance-high-speed-networking","title":{"rendered":"L\u00e0m r\u00f5 QSFP-40G-ER4: H\u01b0\u1edbng d\u1eabn c\u1ee7a b\u1ea1n v\u1ec1 t\u1ed1c \u0111\u1ed9 40 Gbps tr\u00ean kho\u1ea3ng c\u00e1ch 40 km"},"content":{"rendered":"
\"What<\/figure>\n\n\n\n

Trong th\u1ebf gi\u1edbi \u0111\u1ea7y r\u1ee7i ro cao c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5, b\u0103ng th\u00f4ng v\u00e0 t\u1ea7m xa l\u00e0 t\u1ea5t c\u1ea3. Khi Ethernet 40 Gigabit (40GbE)<\/strong> tr\u1edf th\u00e0nh x\u01b0\u01a1ng s\u1ed1ng cho c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quan tr\u1ecdng, nhu c\u1ea7u ph\u1ee7 s\u00f3ng c\u00e1c kho\u1ea3ng c\u00e1ch d\u00e0i h\u01a1n m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 l\u00e0 \u0111i\u1ec1u t\u1ed1i quan tr\u1ecdng. H\u00e3y c\u00f9ng l\u00e0m quen v\u1edbi B\u1ed9 thu ph\u00e1t QSFP-40G-ER4<\/strong><\/a>\u2014 m\u1ed9t th\u00e0nh ph\u1ea7n then ch\u1ed1t nh\u1eb1m thu h\u1eb9p kho\u1ea3ng c\u00e1ch v\u00e0 \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, li\u1ec1n m\u1ea1ch tr\u00ean nh\u1eefng kho\u1ea3ng c\u00e1ch \u1ea5n t\u01b0\u1ee3ng. H\u00f4m nay, ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft m\u1ecdi \u0111i\u1ec1u b\u1ea1n c\u1ea7n bi\u1ebft v\u1ec1 module quang m\u1ea1nh m\u1ebd n\u00e0y.<\/p>\n\n\n\n

\ud83d\udc49\ud83c\udffb B\u1ed9 thu ph\u00e1t QSFP-40G-ER4 l\u00e0 g\u00ec?<\/strong><\/h2>\n\n\n\n

The QSFP-40G-ER4<\/strong> (Quad Small Form-factor Pluggable 40G Extended Reach \u2013 B\u1ed9 thu ph\u00e1t d\u1ea1ng c\u1eafm n\u00f3ng nh\u1ecf g\u1ecdn b\u1ed1n k\u00eanh, t\u1ed1c \u0111\u1ed9 40G, t\u1ea7m xa m\u1edf r\u1ed9ng) l\u00e0 m\u1ed9t module thu ph\u00e1t s\u1ee3i quang c\u00f3 th\u1ec3 thay th\u1ebf n\u00f3ng. Module n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n th\u00f4ng \u0111\u01b0\u1eddng d\u00e0i, truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 40 Gbps tr\u00ean v\u00e0 s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/strong><\/a> v\u1edbi kho\u1ea3ng c\u00e1ch l\u00ean \u0111\u1ebfn 40 kil\u00f4m\u00e9t<\/strong>.<\/p>\n\n\n\n

Module n\u00e0y s\u1eed d\u1ee5ng b\u1ed1n k\u00eanh 10 Gbps \u1edf c\u1ea3 h\u01b0\u1edbng truy\u1ec1n v\u00e0 nh\u1eadn. N\u00f3 \u00e1p d\u1ee5ng c\u00f4ng ngh\u1ec7 \u0110a h\u1ee3p ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng (WDM)<\/strong><\/a> c\u00f4ng ngh\u1ec7<\/strong> \u0111\u1ec3 k\u1ebft h\u1ee3p b\u1ed1n k\u00eanh n\u00e0y v\u00e0o m\u1ed9t s\u1ee3i quang duy nh\u1ea5t, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u qu\u1ea3 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng. \u0110\u00e2y l\u00e0 gi\u1ea3i ph\u00e1p h\u00e0ng \u0111\u1ea7u cho truy\u1ec1n d\u1eabn quang 40G t\u1ea7m xa<\/strong>, k\u1ebft n\u1ed1i c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u, h\u1ed7 tr\u1ee3 truy c\u1eadp m\u1ea1ng \u0111\u00f4 th\u1ecb v\u00e0 thi\u1ebft l\u1eadp li\u00ean k\u1ebft trong khu\u00f4n vi\u00ean doanh nghi\u1ec7p ho\u1eb7c tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc.<\/p>\n\n\n\n

\ud83d\udc49\ud83c\udffb Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh & \u1ee8ng d\u1ee5ng<\/strong><\/h2>\n\n\n\n

Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u00e0 hi\u1ec7u n\u0103ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u1ed5ng quan nhanh:<\/p>\n\n\n\n

\n\n<\/colgroup>

\u0110\u1eb7c t\u00ednh<\/p><\/th>

Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/p><\/th><\/tr>

H\u1ec7 s\u1ed1 d\u1ea1ng<\/strong><\/p><\/td>

QSFP+ (B\u1ed9 n\u1ed1i nh\u1ecf d\u1ea1ng b\u1ed1n c\u1ed5ng c\u00f3 th\u1ec3 c\u1eafm th\u00e1o \u0111\u01b0\u1ee3c phi\u00ean b\u1ea3n n\u00e2ng cao)<\/p><\/td><\/tr>

25Gbps<\/strong><\/p><\/td>

Ethernet 40 Gigabit (40GbE)<\/p><\/td><\/tr>

B\u01b0\u1edbc s\u00f3ng
<\/strong><\/p><\/td>

4x CWDM (1271, 1291, 1311, 1331 nm)<\/p><\/td><\/tr>

Ph\u1ea1m vi t\u1ed1i \u0111a<\/strong><\/p><\/td>

L\u00ean \u0111\u1ebfn 40 km<\/strong> tr\u00ean s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/p><\/td><\/tr>

Lo\u1ea1i s\u1ee3i<\/strong><\/p><\/td>

S\u1ee3i \u0111\u01a1n mode (OS2)<\/p><\/td><\/tr>

\u0110\u1ea7u n\u1ed1i<\/strong><\/p><\/td>

\u0110\u1ea7u n\u1ed1i LC hai chi\u1ec1u (Duplex LC)
<\/p><\/td><\/tr>

Ti\u00eau Th\u1ee5 N\u0103ng L\u01b0\u1ee3ng<\/strong><\/p><\/td>

Th\u01b0\u1eddng < 3,5 W<\/p><\/td><\/tr>

Gi\u00e1m s\u00e1t ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1 (DDM)<\/strong><\/p><\/td>

C\u00f3, \u0111\u1ec3 gi\u00e1m s\u00e1t th\u1eddi gian th\u1ef1c<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

C\u00e1c \u1ee9ng d\u1ee5ng ch\u00ednh:<\/strong><\/p>\n\n\n\n