Cisco IAD2430 Series Manual de início rápido - Página 22
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Connecting WAN and Voice Cables
WAN and voice cables and connections are described in Table 3 and shown in Figure 21.
Table 3
WAN and Voice Cable Selection
Port or Interface
T1/E1,
WAN
WIC-1DSU-T1
T1/E1
Digital voice RJ-48C
WIC-2T
Serial
VIC2-4FXO
FXO
Analog voice
FXS
Figure 21
WAN and Voice Connections
Distribution panel
1
3
Network
demarcation
RJ-21 cable
1
3
RJ-48 straight-through cable
Note
If you have specified the use of a private line automatic ringdown (PLAR) off-premises extension (OPX) connection
mode for an FXO voice port (with loop resistance less than 8000 Ohm), you must ensure that the soft-offhook option
is enabled on the port.
This option allows a stepped offhook resistance during seizure which avoids overloading the circuit during offhook in
the event that ringing voltage is present on the circuit at the same time as the trunk seizure. The stepped offhook
resistance is initially set to 800 Ohms, then adjusts to 50 Ohms when ringing voltage is not present.
22
Color or Type Connected To
Light green
WAN
Digital PBX
60-pin D-sub CSU/DSU and serial
network or equipment
RJ-11
Station side of analog PBX RJ-11 cable
RJ-21
Distribution panel
Digital voice
RJ-45 cable (through a patch panel) to central office
2
4
RJ-48 rollover cable
Cable (not included)
RJ-48 T1 cable
RJ-48 T1 cable
Serial transition cable matching signaling protocol
(EIA/TIA-232, EIA/TIA-449, V.35, X.21, or
EIA-530) and operating mode (DTE or DCE)
RJ-21-to-RJ-21 straight-through cable
To CO
2
Cisco IAD2430 series
4
PBX