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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Anyone familiar with the SBC product lingo?
SONET is a method of transporting TDM channels over fiber. SONET is made up of building blocks calls a STS. A STS is equivalent to a DS-3 + SONET Wrapper. An OC-3 equals 3 STSes. OC-3s come in two types, 'channelized' OC-3 which is 3 DS-3s in 3 STSes and Packet Over SONET (POS), concatenated OC-3c which is 155mbps. If you are planning on using this circuit for TDM based voice (84 T1s in 3 DS-3 chunks) then you will want an OC-3 not an OC-3c. If you are planning on running 155mbps POS IP traffic you want an OC-3c.SONET Circuit Service OC3-c (155Mbps) $2200 vs. Central Office Node Circuit Service OC3/3c (155Mbps) $675 OC-3 = 3 x STS-1 = 3 x DS-3 = 3 x 28 DS-1s, 84 DS-1s = 2016 DS0 voice channels. OC-3c = 1 x STS-3 = 155mbps You can use an Adtran OPTI-3 to break an OC-3 into 3 distinct DS-3 channels which can be plugged into M13 muxes (Carrier Access Widebank 28) which will break a DS-3 into 28 DS-1s. If you want IP bandwidth you can use an OC-3 POS line card from your router vendor of choice. -Matt
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