2-port FXS & 4-port FXO NIM-2FXS/4FXOP=Cisco ISR 4000 Router Modules & Cards

The Cisco 4000 Series Integrated Services Routers (ISRs) host the Cisco network interface modules (NIMs), which have evolved from the enhanced high-speed WAN interface card (EHWIC), increasing port density and module capability. Up to three integrated NIM slots on the 4000 Series allow for flexible configurations. The NIMs support online insertion and removal (OIR), reducing the downtime required for new or replacement modules.

The available modules include 2-port and 4-port foreign exchange station (FXS), direct inward dial (DID), foreign exchange office (FXO), a combination of 2-port FXS and 4-port FXO, 4-port ear and mouth (E/M), and 2-port and 4-port basic rate interface (BRI) (Figure 1). The BRI cards support only voice features. The NIMs have a dedicated digital signal processor (DSP) that will be used for time-division multiplexing (TDM) analog voice services. Table 1 lists the available modules.

The FXS features include:

Capable of supporting either FXS or DID functionality

Configurable long loop ports

Message waiting indicator (MWI)

Cable detection

The FXO features include:

Supports both ground start and loop start modes

Provides call detail record (CDR) information

Support for interworking with Cisco Unified Communications Manager (Skinny Client Control Protocol [SCCP]), H.323, Session Initiation Protocol (SIP) and Media Gateway Control Protocol (MGCP) 1.0

Cable detection

Overload protection

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