Voice over IP

I'm trying to enable T.38 Fax in my network environment using UC520. The setting is something like this:Fax 1 -- UC520 -- CCM -- VOIP -- PSTN -- Fax 2Cisco UC520 (using CME) is the originating gateway for fax 1 to send T.38 fax. It is going to the Ci...

Hiiiiiiii,I am working as service provider. I am having CCM 5.1.and 7906g IP Phone. I don't want to allow any of my customer to call my any IP Phone except one IP Phone which is assigned for 'Helpdesk' from their IP phones.How It's possible? what wi...

Hi,I am having an issue with one way audio that is very limited, but ongoing. Using a Cisco 3745 with IP-IP Gateway, about 1% of all calls have a one way audio issue after about 1 to 5 minutes (H323-H323).The one way audio is always to the side to w...

I have been trying to upgrade some 7940's that are running a version: P003c301 to a SIP image. I want to end up with P0S3-08-6-00. I have tried starting the upgrade with very old versions of the SIP s/w, but my TFTP server keeps showing me that the p...

HelloI'm wondering if someone can guide me on how to upgrade the firmware on my cisco 7912 phone from SCCP to SIP. Plus, where can i get the firmware from?

Hi,We currently have PGW2200 9.5(2) running on SUN Fire V120. As there was some hardware problems with one of our servers we need to get new SUN server. The problem is that Fire V120 is end-of-sale so we need to get another server and my question is ...

After replacing IP-IP gateway 2611XM with 2811(various version IOS) all calls via this gateway originated from Call Manager (or othes sources when signaling and media address are different) to Cisco AS5350 are disconnects with code 47 (no resource). ...

I have two site with using cisco 827 and 1760 route. when I make up a phone call, I can hear the voice from 827 side, but they cannot hear my voice. Is it some setting worng. thank you for helping me. my config are :

I was wandering if some one can help me out ..... I got few questions , basically I be using SIP and need some general info..... How many SIP proxy server we need for 60 IP Phones?If we use SIP proxy server do we still need redirect server?Do we need...

Hello All,I have a small problem which I need your assistnace. I Have a Cisco 5400 box with T1 cards which I use for VOIP purpose. I have hairpinned (looped) the E1 ports. So the call going out of one port will end up into the other.The scenario is l...

Can someone help me with DTMF? how can I know if DTMF is sending it to the AS5300. what is the debug command and how am I supposed to know if its reaching the gateway?thanks

hi,I have build a small Voip setup in which i am connecting DHCP,Call manager and IP phones to Cisco 520 switch.Can any one help me which PORT role will be allocated to which device on Cisco 520 switch so i will know which device is in which Vlan.Th...

Hello - I had a question that I was hoping someone could help me with. I recently had an issue on CallManager 4.1.3sr6a. I have 10 sites, each using their own set of 6 9.@ route patterns for outgoing calls. Although the patterns are distinct, they...

I have to give a strict priority to the IP traffic between RAD IPMUX11, but as I understand my config doesn't work (round-trip min/avg/max = 4/9/92 ms) : 2621_KRKZ#ping Protocol [ip]: Target IP address: 192.168.106.250 Repeat count [5]: 10000 Datagra...

Here is my problem. I get a database error with I try to use the phone services on our 7960 phones. I've been able to replicate this problem at my desk but now even if I delete the user profile and phone from CCM and create a new profile with a diffe...