Mappers Reduce Cost Of Ethernet Services

The DS33M30, DS33M31, and DS33M33 Ethernet-over-SONET/SDH (EoS) mapping devices merge new protocols for transporting Ethernet with the protocols of legacy optical networking, allowing service providers to deliver emerging Ethernet services using the existing optical transport infrastructure. Reportedly, they are the industry's first monolithic SONET/SDH mapping ICs to support the Ethernet-over-PDH (EoPDH) protocol over optical networks. The DS33M31 and DS33M33 both have a 17 mm x 17 mm footprint with the DS33M33 including three additional DS3/E3 add/drop interfaces. The DS33M30 lacks the DS3/E3 functionality and, measuring 10 mm x 10 mm, logs in as the industry's smallest EoS mapper. The DS33M31 and DS33M33 perform EoPDH mapping of Ethernet frames from a Gigabit Ethernet interface into a DS3/E3 frame format, then rely on traditional SONET/SDH mapping techniques to place the DS3/E3 tributaries into an optical OC-3/STM-1. They support not only EoPoS mapping, but also the more traditional EoS mapping in virtually concatenated high-order containers, as does the DS33M30. Supported frame encapsulations include GFP-F, HDLC, cHDLC, and X.86 (LAPS). Prices for the DS33M30, DS33M31, and DS33M33 are $55.77, $65.25, and $72.50 each/5,000, respectively. MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.