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TAG's D4 Monitor Cord (PN#
400480MHS) is used to access dial tone from FXS and FXO cards. The D4 Monitor Cord directional
switch enables dial tone to be pulled from the far end when plugged into the FXS card
or near end (SMAS/Frame) when plugged into the FXO card.
Contact a TAG sales
representative today at:
856-753-8585