http://blog.voipsupply.com/polycom-and-jabra-working-together-to-bring-you-%e2%80%9celectronic-hookswitch%e2%80%9d-capabilities Everything you need to know about VoIP Sun, 07 Mar 2010 06:07:13 -0500 http://wordpress.org/?v=2.8 hourly 1 http://blog.voipsupply.com/polycom-and-jabra-working-together-to-bring-you-%e2%80%9celectronic-hookswitch%e2%80%9d-capabilities/comment-page-1#comment-9372 John Balogh Thu, 24 Jul 2008 16:09:32 +0000 http://blog.voipsupply.com/?p=1112#comment-9372 The Polycom IP501 units also have the 6-pin serial port. Should they work, or must they be upgraded to one of the other listed units? Thanks. The Polycom IP501 units also have the 6-pin serial port. Should they work, or must they be upgraded to one of the other listed units? Thanks.

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