Comments on: Are there any In-band signaling systems still in use in all of America? http://www.td-com.com/business-telephone-systems/are-there-any-in-band-signaling-systems-still-in-use-in-all-of-america/ Equipment, Installation and Repair Fri, 27 Aug 2010 13:34:19 -0500 http://wordpress.org/?v=2.8.4 hourly 1 By: wa2aqq http://www.td-com.com/business-telephone-systems/are-there-any-in-band-signaling-systems-still-in-use-in-all-of-america/comment-page-1/#comment-66 wa2aqq Wed, 23 Dec 2009 20:01:58 +0000 http://www.td-com.com/business-telephone-systems/are-there-any-in-band-signaling-systems-still-in-use-in-all-of-america/#comment-66 There are no crossbar or step by step switches left however there are many in band signaling trunks left particularly from small exchanges such as DMS 10s or even DMS 100s These are general from smaller companies that connect to long distance carriers via a tandem exchange owned usually by a baby Bell Bob who is a telecommunications engineer There are no crossbar or step by step switches left however there are many in band signaling trunks left particularly from small exchanges such as DMS 10s or even DMS 100s These are general from smaller companies that connect to long distance carriers via a tandem exchange owned usually by a baby Bell

Bob who is a telecommunications engineer

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