Question : Connecting an Cisco !P Phone to Call Manager 7 over a VPN

I have a remote user who has a VPN from their home office to the Main Office.  This user wants an IP Phone in her Home Office.  The Main Office has a Call Manager 7 Server.  I can get a phone to register over the VPN no problem, but it seems like something is stopping Voice.  If I call an outside number, I don't hear it ring or do I hear someone pickup, but they can hear me.  If the Home user dials an extension of someone at the main office, they can talk no problem at all.  Not sure what is stopping me from hearing Voice when I call an outside number over the VPN.  The VPN is between a Cisco VPN Concentrator 3005 (main office) and a Pix 501 (home office).  Below are the Pix configs.  Any ideas?
*****************************************************************************************************************
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password
passwd encrypted
hostname RPHC
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list 101 permit ip 192.168.253.0 255.255.255.0 10.0.0.0 255.255.0.0
access-list 101 permit ip 192.168.253.0 255.255.255.0 172.31.252.0 255.255.252.0
access-list NONAT permit ip 192.168.253.0 255.255.255.0 10.0.0.0 255.255.0.0
access-list NONAT permit ip 192.168.253.0 255.255.255.0 172.31.252.0 255.255.252.0
access-list 120 permit ip any any
access-list 100 permit ip any any
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside x.x.x.x 255.255.255.0
ip address inside 192.168.253.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list NONAT
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
access-group 120 in interface outside
access-group 100 in interface inside
route outside 0.0.0.0 0.0.0.0 x.x.x.x 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set CTIset esp-3des esp-md5-hmac
crypto map rphc 1 ipsec-isakmp
crypto map rphc 1 match address 101
crypto map rphc 1 set peer x.x.x.x
crypto map rphc 1 set transform-set CTIset
crypto map rphc interface outside
isakmp enable outside
isakmp key ******** address x.x.x.x netmask 255.255.255.255
isakmp policy 1 authentication pre-share
isakmp policy 1 encryption 3des
isakmp policy 1 hash md5
isakmp policy 1 group 2
isakmp policy 1 lifetime 1000
isakmp policy 2 authentication pre-share
isakmp policy 2 encryption 3des
isakmp policy 2 hash sha
isakmp policy 2 group 2
isakmp policy 2 lifetime 1000
telnet 0.0.0.0 0.0.0.0 inside
telnet timeout 5
ssh timeout 5
console timeout 0
terminal width 80
Cryptochecksum:08b83269ac79db22e845dd68bbd0d1e6
: end

Answer : Connecting an Cisco !P Phone to Call Manager 7 over a VPN

For examle:

Cisco VPN Concentrator 3005 inside leg address: 172.31.252.1

Please add the voice gateway the following:

ip route 192.168.253.0 255.255.255.0 172.31.252.1