Im trying to mock up a lab version of a customer's network. They are using E&M cards to connect to some old computer based fire control systems that have embedded modems.
Of course, I don't have access to any of these fire control computers to use in the lab. Therefore, my thought was to simply use a Cisco 2901 as a "surrogate" fire control system, insert an E&M card into it, and configure it back-to-back with the actual Cisco router (with its own E&M card) used as the voice gateway in their network. I have taken a look at the configuration used at the customer location for the E&M card that connects to the modem. Relevant information follows: voice-port 0/1/0 auto-cut-through operation 4-wire type 2 timeouts call-disconnect 3 connection trunk 1004 ! This is what I currently have: Cisco 2921 replicating the customer router. Config is as follows: auto-cut-through operation 4-wire type 2 I have a Cisco 2901 attempting to replicate the modem in the customer fire control computer with the built in modem. Config is as follows: auto-cut-through operation 4-wire type 2 I have connected the E&M voice ports together using a modified UTP cable. Pin 1 to Pin 4 Pin2 to Pin 5 Of course, I have done a shut / no shut on both ends to activate the changes on the voice port So, this is what I end up with On the E&M cards, the "In Use" light illuminates soon after I plug in my cable. Executing a show voice port summary command (on both ends) shows Admin status - up Operational status - up In Status - seized Out Status - seized Note that I have not configured any dial peers (yet) nor do I have the voice ports in the "connection trunk" mode. I have spent the last hour searching Google, with no results. So, anyone with a working config that they would care to share for a back to back E&M connection - or can shed some light on why my voice ports are seized? I tried 2 other cables pinned out the same way with no changes. I attempted to add dial peers, and all calls failed (as expected). Ccapi inout debugs showed the failure reason to be "busy". I expect this as my voice port summary is showing that the line is already seized. I have rebooted the router, unplugged and replugged the cable, shut down the port several times. I have also tried Type 5 with same results. Any help appreciated. Jeff -------------------------------------------------------------------------------------- Dr. Jeffrey T. Girard (Jeff), PhD Colonel, United States Army (Retired) Senior Network Engineer / VoIP Engineer - WireMeHappy.com (607) 835-0406 (home office) (845) 764-1661 (mobile) (607) 835-0458 (fax)
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