[Asterisk-Users] Suggestions for tunning SJphone with Asterisk?

[Chuck Bunn]

Hi,

I am having voice quality problems with SJPhone under certain 
conditions. Setup is Fedora 4 with Asterisk 1.2rc2 and Digium TDM 400P 
(2FXO's and 2 FXS's).

SJPhone => outside line => echo's, scratchy
ZyXel P2000WV2 => outside line => clear as a bell

SJPhone => recording voice mail => clear as a bell
ZyXel P2000WV2 => recording voice mail => clear as a bell

SJPhone => picking up voice mail => clear as a bell
ZyXel P2000WV2 => picking up voice mail => clear as a bell

SJPhone => to any voice mail (connected remotely via VPN to network 
containing Asterisk) => clear as a bell

SJPhone => 3 way conference with Meet me => echo's, scratchy
ZyXel P2000WV2 => 3 way conference with Meet me => unsure since 
conference was with 2 SJPhones

SJphone => internal extension => echo's, scratchy
ZyXel P2000WV2 => internal extension => unsure since talking with SJPhone

**********************************
Here is my 'sip.conf'

general]
context=default
srvlookup=yes

;Zyxel - P2000WV2
[300]
context=internal-home
type=friend
username=300
secret=xx
callerid=<300>
nat=no
host=dynamic
mailbox=300
careinvite=no
disallow=all
allow=alaw
dtmfmode=rfc2833

;SJphone
[301]
context=internal-home
type=friend
username=301
secret=xx
callerid=<301>
qualify=yes
nat=no
host=dynamic
mailbox=301
;careinvite=no
allow=g729
dtmfmode=rfc2833

;SJphone
[302]
context=internal-home
type=friend
username=302
secret=xx
callerid=<302>
qualify=yes
nat=no
host=dynamic
mailbox=302
;careinvite=no
allow=g729
dtmfmode=rfc2833

;SJphone
[303]
context=internal-home
type=friend
username=303
secret=xx
callerid=<303>
qualify=yes
nat=no
host=dynamic
mailbox=303
;careinvite=no
allow=g729
dtmfmode=rfc2833

;SJphone
[304]
context=internal-home
type=friend
username=304
secret=xx
callerid=<304>
qualify=yes
nat=no
host=dynamic
mailbox=304
;careinvite=no
allow=g729
dtmfmode=rfc2833

;SJphone
[305]
context=internal-home
type=friend
username=305
secret=xx
callerid=<305>
qualify=yes
nat=no
host=dynamic
mailbox=305
;careinvite=no
allow=alaw
allow=g729
dtmfmode=rfc2833

;Zyxel - P2000WV2
[306]
context=internal-home
type=friend
username=306
secret=xx
callerid=<306>
nat=no
host=dynamic
mailbox=306
careinvite=no
disallow=all
allow=alaw
dtmfmode=rfc2833

;SJphone
[307]
context=internal-home
type=friend
username=307
secret=xx
callerid=<307>
qualify=yes
nat=yes
host=dynamic
mailbox=307
;careinvite=no
allow=g729
dtmfmode=rfc2833

;Zyxel - P2000WV2
[500]
context=internal-rest
type=friend
username=500
secret=xx
callerid=<500>
nat=no
host=dynamic
mailbox=500
careinvite=no
disallow=all
allow=alaw
dtmfmode=rfc2833

************************************
 HERE IS MY 'zapata.conf'

[trunkgroups]

[channels]
usecallerid=yes
hidecallerid=no
callwaiting=no
threewaycalling=no
transfer=yes
echocancel=yes
echotraining=yes

context=incoming-home
signalling=fxs_ks
group=1
channel => 1,2

context=trunkdial
signalling=fxo_ks
group=2
channel => 3,4

****************************************************
Any suggestions for what to tune would be greatly appreciated.

Thanks