Description Easily increase the X25 standard telephone line capacity by adding the 4COLA 4-Port CO Line Adapter. 4COLA auto-configures & registers with the X25 system when installed on the same data network. Expand X25 server standard telephone company line capacity from (4) lines to (8) lines by adding the 4-Port CO Line Expansion Adapter (4COLA). With 4COLA installed the X25 supports up to (8) telephone company lines, (8) VoIP lines, (24) XBLUE IP Phones & (1) standard cordless phone or fax for a total capacity of (16) lines & (25) phones. XBLUE’s Innovative “Do-It-Yourself” design makes it very easy to self-install which saves you money by eliminating expensive professional installation and programming fees. XBLUE offers high quality live pre and post sale product support by calling (866) 925-8312.  Our US based support staff is ready to assist! So please call us with any questions you might have. Specifications Brand : XBLUE Customizable : No Weight : 2.50 lbs. per Each
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