Problem with IP phone over VPN

         |   UC520   | ------------------------ |     861     |
                 |                                                  |
              LAN                                             LAN
Scenario:
UC520 box is at HQ and serving as a EZVPN server and 861 at branch as a EZVPN client. There is no problem with VPN i can communicate with HQ network. My ip phone get registered but facing these problems.
1) Dialling out and in OK
2) Connects OK after picking up
3) NO sound either way
4) Cannot end call from this side. End call button does not work
5) When other end hangs up - message "UCM down, features disabled". Then phone registers again.
Identical symptoms for both softphone and 7941.

This document provides a sample configuration for Quality of Service (QoS) for Voice over IP (VoIP) traffic on VPN tunnels that terminate on the PIX/ASA Security Appliances.
http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a008080dfa7.shtml

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Repair Pricing section - http://www.apple.com/support/iphone/service/faq/
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System setup:
- Router Cisco 2811 with IOS 12.4(24)T5 Advanced IP Services, CUCME 7.1, DHCP Server
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- Switches:
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Network diagram:
C2811---HWIC-4ESW---SWITCH---IPPhones
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1. In the old setup with SLM224P everything works fine.
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- power cycle / reset
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None of the above methods worked.
The only action that allowed ip phones to register was changing smartport role to static IPPhone + Desktop.
After that when phone was disconnected and then reconnected the problem exists again - no registration (IP Phone status DECEASED in CUCME). Same with power cycle/reset.
Please advice.
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Problem with IP phone over VPN

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