Cisco OL-12812-01 - Manual (Page 9)

Connecting Cisco Voice Network Modules to the Network
IP Communications High-Density Digital Voice or Fax Network Module
9
Connecting Cisco Voice Network Modules to the Network
These three base-board SKUs also include a single VIC or VWIC slot for Foreign Exchange Station
(FXS), Foreign Exchange Office (FXO) or centralized automated message accounting trunk protocol
(CAMA), receive and transmit (E&M), Direct Inward Dial (DID), Basic Rate Interface (BRI), or E1/T1
interface cards.
Figure 13 NM-HDV2
Figure 14 NM-HDV2-1T1/E1
Figure 15 NM-HDV2-2T1/E1
The NM-HDV2 network module converts voice and fax into IP packets or frames that can be transmitted
as VoIP over a variety of transport technologies (channelized T1, Frame Relay, Asynchronous Transfer
Mode [ATM], and others).
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.
To enable soft-offhook command on the port, and to access the connection command with plar opx
syntax, see the
Cisco Command Lookup Tool .
NM-HDV2
PVDM 3 PVDM 2 PVDM 1
See Manual before Installation.
PVDM 0
V0
EN
95196
NM-HDV2-1T1/E1
PVDM 3 PVDM 2 PVDM 1
CTRLR T1/E1 0
See Manual before Installation.
PVDM 0
V0
AL
LP
CD
EN
95197
NM-HDV2-2T1/E1
PVDM 3 PVDM 2 PVDM 1
CTRLR T1/E1 0
See Manual before Installation.
PVDM 0
V0
AL
LP
CD
AL
LP
CD
EN
95198
CTRLR T1/E1 1