Carrier Access 5395 Pearl Parkway User Manual
Page 61

Analog Ports
8-7
The interpretation of the signaling bits for ESF framing are as follows:
The following abbreviations are used in this table:
LCF - Loop current feed
RLCF - Reverse loop current feed
LCFO - Loop current feed open
LO - Loop Open
LC - Loop closure
RG - Ring ground
ESF Framing Format
See the legend at the end of this table for explanations of abbreviations.
Signaling Type
State
Receive (Network-to-
CI)
Transmit (CI-to-
Network)
Rx
Tx
A
B
C
D
A
B
C
D
Loop-start signaling
(FXO-FXS)
LCF
LO (on hook)
0
1
0
1
0
1
0
1
Ringing
LC (off hook)
0
0
0
0
1
1
1
1
Loop-start signaling
with RLCF (FXO-
FXS)
LCF
LO (on hook)
0
1
0
1
0
1
0
1
RLCF
LC (off hook)
0
1
0
0
1
1
1
1
LCFO
1
1
1
1
Ringing
0
0
0
0
Ground-start
signaling (FXO-
FXS)
LCF
LO (on hook)
0
1
0
1
0
1
0
1
LCFO
LC (off hook)
1
1
1
1
1
1
1
1
Ringing
RG (service
request)
0
0
0
0
0
0
0
0
Ground-start
signaling with
RLCF (FXO-FXS)
LCF
LO (on hook)
0
1
0
1
0
1
0
1
RLCF
LC (off hook)
0
1
0
0
1
1
1
1
LCFO
RG (service
request)
1
1
1
1
0
0
0
0
Ringing
0
0
0
0
Loop-reverse-
battery signaling
(DID) (DPO-DPT)
LO
LCF
0
0
0
0
0
0
0
0
LC
RLCF
1
1
1
1
1
1
1
1
Network-provided
reverse battery
(enhanced 911
apps) (DPT-DPO)
LCF (on
hook)
LO (on hook)
0
0
0
0
0
0
0
0
RLCF (off
hook)
LC (off hook)
1
1
1
1
1
1
1
1
E&M signaling
on hook
on hook
0
0
0
0
0
0
0
0
off hook
off hook
1
1
1
1
1
1
1
1
D4 (SF) Framing Format