Hello,
I recently replaced our old PBX with a brand new and shiny UC560.
The setup:
We have 4 SPA525G2 and about 14 7960s phones.
The UC560 is directly connected to a SG300-24p switch, which again connects two SG300-10p switches on other floors. The switches run 1.1.2.0, the UC560 runs the latest software pack (8.6). The UC560 is DHCP for the voice VLAN100 but does not provide any serviceces for the data VLAN1. We have an external firewall and router who do DHCP for the data-vlan. The WAN port on the UC560 is not used, firewall nat and VPN are disabled - the UC560 is "just a client" in our network. For what I can tell, the network configuration is working fine.
The landline are two German ISDN p-t-p lines connected to the built in BRI Ports. A 2 BRI VIC is also installed - it is configured as network emulation port and connects an ISDN-fax-machine (works also fine)
Most of the configuration was done with CCA just some special stuff (UCXSI, BRI as network emulation) was done by CLI.
The problems - maybe they are related, maybe not:
The first one is annoying but not critical: When I answer a call on my SPA525G2 I have to wait like 1-2sec (after moving the handset to my ear) before I can start talking, otherwise the caller won't hear what I said during those initial 1-2 sec. I did not yet verify the same behaviour on a 7960 phone.
The second problem is really critical. Sometimes (this happend at least thrice) when a call is ringing, after picking up the handest (or pressing the headset button, or pressing the speaker phone button) the phone will continue to ring and not answer the call. The call was a real call, because I called the caller back and asked if he just called, because I was unable to pickup the call. The problem might be blast group related, because at all times when it happed the calls in question arrived at a DID that is mapped to a blast group. After not being able to pickup the call on my phone, I jumped to a co-worker's desk and tried his phone, which is in the same blast group and I also was unable to answer the calls. This occurs on both SPA525g2s and 7960s and only occured with the blast group which contains about 15 phones/extensions.
Any suggestions to point me in the right direction are welcome!
regards + thanks,
Fabian
