Initial softphone ring hit or miss v2.8-440a

[helios2052]

Hi guys,
I have a working vicidial cluster, but every time an agent logs into the vici agent portal, their sip phone most likely won't ring with the initial call. They may have to log out/back in 10 times before they finally get the ring that says "you are the only person in this conference". With 60 people, the floor managers spend a lot of time helping people get logged in everyday and I'm out of obvious ideas. A possibly related problem is that each agent complains that zoiper or xlite simply hangs up a couple times throughout the day, thus triggering the tedious login procedure again.

Steps I have tried to fix the problem:
1) used both xlite and zoiper on agent computers
2) tried phones on a different network (remote phones)
3) tried evenly distributing phones across servers
4) created phone aliases and tried that to see if it was a load issue (made it worse)
5) verified that on the softphone it always says (registered or ready) before logging in
6) verified that no computer has the same xlite/zoiper settings (in case 2 systems were registering the same phone)

It does not seem to matter what computer, what soft phone, or which dialer they are logged into. Their initial call could ring on the first try, but most of the time it could take 3-4 log ins and outs. I'm open to ANY ideas... Thanks in advance for any help guys

----------VERSIONS AND SPECS OF SERVERS-----------
Installation Method: Vicibox 6.0.1 as a cluster
Revision: 2122
VERSION: 2.8-440a
BUILD: 140521-2101

Database: Lenovo RS140 - Xeon E5 Quad Core - 24 GB Ram - 512 GB SSD Raid 1
Dialers (x5): Proliant dl380 G6 - 8 core - 12gb ram
Web: Prliant dl380 G4

Network: Dialers and DB on a gigabit interal network as well as connected to Fios ISP via gigabit. All servers have their own static IP.
Agent computers: Pentium Dual Cores - Win XP - 10/100 hardwired - xlite and zoiper installed

[helios2052]

I should also note, the problem is no better or worse whether there are 3 agents on the phones or 50.

[helios2052]

Any ideas? This is creating quite a problem for my staff. The same thing happens when trying to blind monitor a call. It will say "success calling ..." but then the registered softphone may or may not ring one the first, second, or third try.

[helios2052]

Sorry for all the posts but I think I found the solution.

In account settings under zoiper (under advanced) I had to set set "keep-alive time out" to enabled and I also changed "registration expiry" to 60. It seems that each station rings perfectly the first time now! I guess I should have seen that setting but I'm posting my solution in case anyone else ever has the same issue, however trivial the solution may be.