Cisco ISDN Basic (B) Network Modules
Cisco Integrated Services Digital Network (ISDN) Basic Network Modules (B) are Basic Rate Interface Network Modules that provide ISDN Concentration through ISDN BRI connections. This is done via RJ-45 connectors. None of these ISDN Basic Network Modules rely on any other type of network modules, WICs, VICs, or AIM modules for their operation. They provide their supreme functionality immediately without the need for installation any other device.
Cisco NM-4B-S/T - 4-Port ISDN-BRI Network Module
Cisco 4-Port ISDN-BRI Network Module. Cisco model number: NM-4B-S/T
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Cisco NM-4B-U - 4 Port ISDN-BRI, NT-1 Network Module
Cisco 4-Port ISDN-BRI with NT-1 Network Module. Cisco model number: NM-4B-U
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Cisco NM-8B-U - 8 Port ISDN-BRI, NT-1 Network Module
Cisco 8-Port ISDN-BRI with NT-1 Network Module. Cisco model number: NM-8B-U
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