双向通话系统  制造商、经销商、供应商

DU-POL Ltd.. is specialised in the design, manufacture and development of all our hardwares and softwares. We have been on the market for several decades helping different companies get onto the market with their own products.
We are primarily involved in the development, manufacturing and sales of cutting-edge security technology apparatus. All development and manufacturing is done in-house, thus we can immediately react to any market impact (e.g. large volume order), or unique needs of our customers, be it special features or technological modifications. Our own expectation is compact, quick and efficient work in all areas.

Online Fachhandel für den Vertrieb von Elektromaterial, Verteiler- und Zählerschränken, Schalterprogrammen, Beleuchtung zu Großhandelspreisen

Founded with a vision for pioneering in the realm of audio solutions, ZYCOO stands as a distinguished developer and manufacturer of IP telephony and public address systems. Our commitment spans over the years, producing powerful all-in-one solutions that amalgamate both software and hardware, primarily serving the SME market.

SUNTECH INTL HK CO., LIMITED( Suntech Co., Ltd.) was founded in 2003 from China, a leading global IT networking supplier of new and pre-owned network equipment and accessories.With an experienced and professional team, we have exported our new and used network items to many countries and regions all over the world. Our products enjoy a good reputation among our customers. We welcome customers, business associations and friends from all parts of the world to contact us and seek cooperation for mutual benefits.
Our main products:
CISCO, Finisar, Juniper, HUAWEI, IBM's SFP, GBIC, XFP Transceiver MODULES, Network Switches, NetScreen, Network cards, X2-10GB-SR, GLC-T, SFP-10G-SR, XFP-10GER-192IR+, ONS-CXP-100G-SR10, CVR-QSFP-SFP10G=, HWIC-2FE, HWIC-2CE1T1-PRI, C2960X-STACK, WS-C2960S-LPD-L, WS-C3750X-48T-L, WS-C2960X-48LPS-L etc
Our Features
Original guarantee
We are supplying plenty of products that ordinary distributors can no longer supply, complete with the original manufacturer guarantees. All of our used networking equipments and parts are tested, cleaned and good condition.
Competitive Price
We are committed to offer client great product the best price in Chinese market. With the advantage of Up to 70%-90% price off compared with original price, we manage to maximize clients’ profits by reducing the product cost.
Perfect After-sale service
We provide guarantee safe packaging, speedy service, and delivery. We go out of our way to provide timely answers and technical assistance to address clients’ specific needs. Our after-sale Department will keep up to date on new developments with regard to every order, and we offer free maintenance for return equipments.
Extended warranty
We offer 1 year warranty for all new items, and replacement or return is available within 30 days. As for used items we include a 180-day replacement or refund warranty. From our long-term warranty policy, we give clients unsurpassed confidence when purchasing our equipment.
Professional technical support
Our Company has built a professional technology team of 10 staffs with above 10 years working experience on IT network. Every used part we deliver to our customer has been fully reconditioned and tested at our Corporate Technical Center to meet or exceed original factory performance specifications.
Payment terms
100% prepay by T/T or Paypal are both OK.

Finisar 是光通信领域的全球技术领导者。我们的世界级产品可在网络、存储、无线和有线电视应用中实现语音、视频和数据高速通信的高速通讯。25 年来，我们在光学技术领域不断创造重大技术突破，并为系统制造商提供了所需的大批量产品，以满足网络带宽的爆炸式增长需求。Finisar 业界领先的产品包括光纤收发器、光引擎、有源光缆、光器件、光学仪器、ROADM 和WSS波长管理器、光放大器和光载射频模块。