Like other vendors, Galazar deploys so-called transparent GFP to support SAN protocols in Sonet/SDH. Transparent GFP is required to map protocols that don't have a specified frame format that can be used to replace the one typically used in Sonet/SDH networks. In contrast, Ethernet can be mapped to Sonet/SDH by using frame-mapped GFP in place of the high-level data link control (HDLC) protocol in Sonet/SDH.
Galazar's introduction of SAN mappers is no surprise. The market for framers has grown in recent years, as vendors such as Alcatel SA (NYSE: ALA; Paris: CGEP:PA), Fujitsu Ltd. (OTC: FJTSY; Tokyo: 6702), Lucent Technologies Inc. (NYSE: LU), Nortel Networks Corp. (NYSE/Toronto: NT), and Siemens AG (NYSE: SI; Frankfurt: SIE) seek to help service providers add Ethernet and, increasingly, storage services to their metro Sonet/SDH offerings.
Mary Jander, Site Editor, Byte and Switch
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