I recently purchased a used Cisco 12SP+ VOIP while I was still working for Network Operations at a university. The VOIP admin added my phone to the system so that I could "play" with trying to learn about VOIP. I tested the unit on campus and was able to place calls through the gateway and call other IP phones no problem. I brought the phone home and put it behind my Linksys BEFSR41 Cable Modem/DSL router. I was able to pull an IP from the router's DHCP server and access the VOIP server. Whenever I attempted to make a call through the gateway, I would call my cell phone. I wouldn't hear any ringing or sound through the IP phone, but my cell phone would ring and I could hear words from the IP phone on my cell phone. Whenever I called other IP phones, I could hear the phone dialing, but when someone answered they could hear me, but I could not hear them.
I don't work for NetOps anymore, but they have assured me that my phone is still in the system. I also recently upgraded the firmware on my router to 1.44.2. Now whenever I try to make gateway calls, the IP phone attempts to call and then just goes blank. Whenever I call other IP phones, I can hear it ringing, but still nothing on the other end.
I've tried putting the phone in the DMZ zone on my router as well as forwarding the ports that I noticed being used to the IP address of my IP phone. Does anybody have any hints or suggestions that would allow me to utilize this other that buying really expensive network equipment or getting multiple IPs at my house.
I don't work for NetOps anymore, but they have assured me that my phone is still in the system. I also recently upgraded the firmware on my router to 1.44.2. Now whenever I try to make gateway calls, the IP phone attempts to call and then just goes blank. Whenever I call other IP phones, I can hear it ringing, but still nothing on the other end.
I've tried putting the phone in the DMZ zone on my router as well as forwarding the ports that I noticed being used to the IP address of my IP phone. Does anybody have any hints or suggestions that would allow me to utilize this other that buying really expensive network equipment or getting multiple IPs at my house.