Cisco NIM-2FXO 2-Port Analog FXO Voice NIM
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View Products →Overview
Analog and digital voice access migration plan
Identify the line role and signaling before selecting a router voice module.
Deployment scope
Identify the line role and signaling before selecting a router voice module. Inventory the carrier handoff, PBX role, signaling, grounding and simultaneous call requirement. Match the host and module, then size DSP resources for the codec and service. Schedule a staged migration with test numbers and rollback.
Component decisions
- NIM-2FXO and NIM-4FXO provide FXO analog interfaces; they are not FXS subscriber ports.
- NIM-2MFT-T1/E1, NIM-4MFT-T1/E1 and NIM-2CE1T1-PRI require checking the exact digital interface and operating role.
- Voice service also depends on supported host software, DSP or PVDM resources, codecs and entitlements. Port count alone does not prove call capacity.
Acceptance plan
- Test inbound and outbound calls, signaling and caller identification as required.
- Exercise concurrent calls, fax or other contracted services.
- Record line settings, DSP resources, software and acceptance results.
Configuration boundary
FXO and FXS describe opposite roles on an analog connection. Digital T1/E1 and PRI add a different physical and signaling layer. A module with the right number of sockets can still be the wrong interface for the carrier or PBX.
Technical references
ISR 4000 — official reference: https://www.cisco.com/c/en/us/support/docs/routers/4000-series-integrated-services-routers/118792-config-isr-00.html NIM — official reference: https://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/b-ConfVoiFxNIM.html Continuous value delivered with new Cisco SD-WAN innovations — official reference: https://blogs.cisco.com/networking/continuous-value-delivered-with-new-cisco-sd-wan-innovations ISR 4000 NIM — official reference: https://www.cisco.com/c/en/us/products/collateral/routers/4000-series-integrated-services-routers-isr/datasheet-c78-733646.html T1/E1 NIM — official reference: https://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/4gen-t1-e1-nim-guide.html
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