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Cisco 7600 Series  Cisco 7600 Spares & Accessories OSM-12CT3/T1 12pt Channelized DS-3 to DS-1/DS-0
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The new, used or refurbished Cisco OSM-12CT3/T1 you are interested in is a: 12pt Channelized DS-3 to DS-1/DS-0 .
The OSM-12CT3/T1 module provides 12DS3 interface connections using mini-SMB connectors.
Each DS3 port can be independently configured all the way from a clear channel DS3 down to and including DS1, E1,and DS0 connections on the same port, with a maximum of 128 channels per DS3 port.
An unchannelized DS3 connection provides a single serial interface data channel that may be configured to use all of the DS3 bandwidth or a fractional portion of it. This mode is compatible with several vendors of fractional (subrate) DS3 data service units (DSUs).
A cost, depending on the bandwidth, is associated with a serial interface. The total cost possible for 12 DS3 ports is 4096. That is, the sum of the costs of all the serial interfaces configured on 12 DS3 ports must be no more than 4096. The show controller t3 command displays the VC cost, which indicates the available cost of 12 DS3 ports. | 
