1.Overview:
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. 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.
Note: These NIMs are not supported with the Cisco 2900 and 3900 Series ISRs.
2.Sepecification
Table 1. Cisco FXO and FXS NIM Types and Feature Comparison
Part Number | Number of Ports | ISR G2 comparison |
NIM-2FXO | 2 | VIC2-2FXO |
NIM-4FXO | 4 | VIC2-4FXO |
NIM-2FXS | 2 | VIC3-2FXS/DID |
NIM-4FXS | 4 | VIC3-4FXS/DID |
NIM-2FXS/4FXO | 6 | VIC2-4FXO and VIC3-2FXS/DID |
NIM-2FXSP* | 2 | VIC3-2FXS/DID |
NIM-4FXSP* | 4 | VIC3-4FXS/DID |
NIM-2FXS/4FXOP* | 6 | VIC2-4FXO and VIC3-2FXS/DID |
NIM-4E/M | 4 | VIC3-2E/M |
NIM-2BRI-NT/TE | 2 | VIC2-2BRI-NT/TE |
NIM-4BRI-NT/TE | 4 | VIC2-2BRI-NT/TE |
Management Feature | |
Telnet or console | Remote and local configuration, monitoring, and troubleshooting from Cisco IOS XE Software command-line interface. |
Simple Network Management Protocol (SNMP) | ● Router and data service unit (DSU)/channel service unit (CSU) managed by single SNMP agent; router, DSU, and CSU appear as a single network entity to user ● Standard MIB (MIB II) ● Cisco Integrated DSU/CSU MIB ● RFC 1406 T1 MIB, including Alarm Detection and Reporting |
SNMP traps | Generated in response to alarms |
Table 3 lists the standards the cards have been tested to.
Table 3. Standards
NIM-FXO | NIM-FXS | NIM-BRI | NIM-E/M |
TIA-968-B (USA) CS-03 (Canada) AS/CA S002 (Australia) AS/CA S003 (Australia) PTC220 (New Zealand) TBR 21 (CE countries) | TIA-968-B (USA) CS-03 (Canada) AS/CA S003 (Australia) PTC220 (New Zealand) | TIA-968-B (USA) CS-03 (Canada) AS/ACIF S031 (Australia) PTC220 (New Zealand) TBR 3 (CE countries) ITU-T I.430 | TIA-968-B (USA) CS-03 (Canada) AS/CA S003 (Australia) |
Compliance
Table 4 lists the standards with which the NIMs comply.
Table 4. Compliance Standards
Emission | Immunity |
47 CFR Part 15 CISPR22: Edition 6.0: 2008 CNS13438: 2006 EN 300 386 V1.6.1 EN 55022:2010 EN61000-3-2: 2006 [Inc amd 1 '&' 2] EN61000-3-3: 2008 ICES-003 Issue 5: 2012 KN 22: 2009 TCVN 7189: 2009 VCCI: V-3/2013.04 | CISPR24: 2010 EN 300 386 V1.6.1 EN55024: 2010 KN24: 2011 TCVN 7317: 2003 |
Table 5. Ordering Information
Product ID | Product Description |
NIM-2FXO | 2-port Network Interface Module - FXO (Universal) |
NIM-4FXO | 4-port Network Interface Module - FXO (Universal) |
NIM-2FXS | 2-Port Network Interface Module - FXS, FXS-E and DID |
NIM-4FXS | 4-Port Network Interface Module - FXS, FXS-E and DID |
NIM-2FXS/4FXO | 2-Port FXS/FXS-E/DID and 4-Port FXO Network Interface Module |
NIM-2FXSP | 2-Port Network Interface Module - FXS, FXS-E and DID |
NIM-4FXSP | 4-Port Network Interface Module - FXS, FXS-E and DID |
NIM-2FXS/4FXOP | 2-Port FXS/FXS-E/DID and 4-Port FXO Network Interface Module |
NIM-4E/M | 4-Port E/M Network Interface Module |
NIM-2BRI-NT/TE | 2-Port BRI Network Interface Module |
NIM-4BRI-NT/TE | 4-Port BRI Network Interface Module |
Since the fourth-generation Cisco NIMs have their own DSP to support voice, there is no need to synchronize the clock to the backplane, and the clock-participate command is not supported in the BRI, FXO/FXS, and E/M NIMs. The NIMs support:
● Caller line ID
● G.711, G.729a, and G.726
● G723 and Internet Speech Audio Codec (iSAC); Internet Low Bit Rate Codec (iLBC) is on the roadmap
● Fax detection, pass-through, and relay (T.38)
● Modem detection and pass-through
● Dual-tone multifrequency (DTMF) detection
● Echo cancellation
● Voice activity detection
● Comfort noise generation
● Real-Time Control Protocol (RTCP)
● Acoustic shock protection
● Noise reduction is on the roadmap
● Real-Time Transport Protocol (RTP)
● RFC 4733 Digit Relay
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