The ONS 15454 DS3XM-6 and DS3XM-12 cards, commonly referred to as transmux cards, provide 6 and 12 Telcordia compliant GR-499-CORE M13 multiplexing functions. The DS3XM-6 converts six framed DS-3 network connections to 28x6 or 168 VT1.5s. The DS3XM-12 converts twelve framed DS-3 network connections to 28x12 or 336 VT1.5s. You cannot create circuits from a DS3XM-6 or DS3XM-12 card to a DS-3 card. DS3XM-6 and DS3XM-12 cards operate at the VT1.5 level.
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