Table 4: Ground-Start Signaling at FXO Interface for Call Initiated by the FXO Interface (continued)
Signaling Bits from FXO
Signaling Bits to FXO
01
11
FXO goes off-hook (closes loop)
01
11
Duration of call
Table 5: Ground-Start Signaling at FXO Interface for Call Initiated by the FXS Interface
Signaling Bits from FXO
Signaling Bits to FXO
11 (A=1, B=1)
01 (A=0, B=1)
Idle (before call starts)
00/01 (B-bit toggles)
01
FXS goes off-hook (grounds tip and
sends AC ring signal)
01
11
FXO goes off-hook (closes loop)
01
11
Duration of call
Table 6: Ground-Start Signaling at FXS Interface for Call Initiated by the FXS Interface
Signaling Bits from FXS
Signaling Bits to FXS
01 (A=0, B=1)
11 (A=1, B=1)
Idle (before call starts)
01
00/01 (B-bit toggles)
FXS goes off-hook (grounds tip and
sends AC ring signal)
11
01
FXO goes off-hook (closes loop)
11
01
Duration of call
Table 7: Ground-Start Signaling at FXS Interface for Call Initiated by the FXO Interface
Signaling Bits from FXS
Signaling Bits to FXS
01 (A=0, B=1)
11 (A=1, B=1)
Idle (before call starts)
00
11
FXO grounds ring
00
01
FXS goes off-hook (grounds tip and
sends AC ring signal)
25
Содержание CTP2000 Series
Страница 1: ...CTP2000 Series Circuit to Packet Platforms Hardware Guide Published 2020 08 31 ...
Страница 8: ...1 PART Overview CTP2000 Series Platform Overview 2 CTP2000 Series Interface Modules 11 ...
Страница 112: ...Installing SFPs in a CTP2000 Module 102 105 ...
Страница 127: ...5 PART Configuration Accessing the CTP2000 Platform 121 ...
Страница 144: ...7 PART Troubleshooting Troubleshooting Power Failures 138 Contacting Customer Support 140 ...
Страница 149: ...Locating CTP Component Serial Numbers 141 Returning CTP Products for Repair or Replacement 136 142 ...