Juniper CTP2000 Series Hardware Manual page 32

Table 4: Ground-Start Signaling at FXO Interface for Call Initiated by the FXO Interface (continued)
FXO goes off-hook (closes loop)
Duration of call
Table 5: Ground-Start Signaling at FXO Interface for Call Initiated by the FXS Interface
Idle (before call starts)
FXS goes off-hook (grounds tip and
sends AC ring signal)
FXO goes off-hook (closes loop)
Duration of call
Table 6: Ground-Start Signaling at FXS Interface for Call Initiated by the FXS Interface
Idle (before call starts)
FXS goes off-hook (grounds tip and
sends AC ring signal)
FXO goes off-hook (closes loop)
Duration of call
Table 7: Ground-Start Signaling at FXS Interface for Call Initiated by the FXO Interface
Idle (before call starts)
FXO grounds ring
FXS goes off-hook (grounds tip and
sends AC ring signal)
Signaling Bits to FXO
11
11
Signaling Bits to FXO
01 (A=0, B=1)
01
11
11
Signaling Bits to FXS
11 (A=1, B=1)
00/01 (B-bit toggles)
01
01
Signaling Bits to FXS
11 (A=1, B=1)
11
01
Signaling Bits from FXO
01
01
Signaling Bits from FXO
11 (A=1, B=1)
00/01 (B-bit toggles)
01
01
Signaling Bits from FXS
01 (A=0, B=1)
01
11
11
Signaling Bits from FXS
01 (A=0, B=1)
00
00
25