Black Box COMPACT T1 MT850A - Manual (Page 399)

Compact T1 - Release 6.1 8-5
FXS Voice Card
Technical Specifications
FXS Signaling Performance
l DC Loop Range: 1000
Ω
standard, 1600
Ω
extended
l
Loop Feed: Nominal -48 VDC with 31mA current limit for long loops, -36 VDC
@ 27mA for short loops with automatic battery switching
l Off-Hook Detection: Detects tip or ring currents > 6mA
l
Ring Ground: Detects ring ground currents > 8mA
l Ringing Voltage: All-channel simultaneous ringing power, 85 V rms, 20 Hz
l Maximum Ringers: 5 REN, FCC Class B ringers
l Internal Ringing Cadence: Ringing cadence is 2 seconds on, 4 seconds off for
E&M wink start conversion modes
l Control Technique: Solid-state with no mechanical relays
l Overvoltage: UL 1950, FCC Part 68 lightning protection
l Overcurrent: 600 V rms, 60 Amps
l Supports CLASS features such as calling party ID, three-way calling, and
distinctive ringing
l Calling Party Disconnect: Calling party (forward) disconnect provides 2 second
current interruption to disconnect answering devices and modems - requires
E&M signaling service on the T1
l FXS Signaling: FXS loop start or FXS ground start with LS/GS selection per
channel
l FXSDN Signaling: E&M immediate or wink start to either loop start or ground
start conversion with ringback tone for carrier services such as Megacom
®
,
Flexpath
®
, DSS
®
, VPN
®
, VNET
®
, etc. Wink delay for advanced ANI/DNIS 800
number services
l Ringer Equivalency Number (REN): 0.0 by definition