Provides dual E&M or TO ports in either
2- or 4-wire modes for use in TSU or TDU. Supports Type I or Type II signaling.
Responds to 2713Hz loopback tone. (HOT SWAPPABLE)
Features:
Two voice ports operate in 2-wire
or 4-wire E&M
Type I/Type II/Type V or transmit only modes
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