Expansion Modules
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Filter in catalog →Frequently asked questions
What is the Cisco 991031 used for?
The Cisco 991031 is a 6-port voice/fax expansion module used to enhance the connectivity of Cisco communication systems by adding FXO ports for traditional analog telephone lines.
Which systems is the Cisco 991031 compatible with?
The Cisco 991031 is compatible with Cisco communication systems, providing additional voice and fax connectivity options.