Finally some luck in configuring the DVG-1120s using CallCentric's support for the DVG-1402s on
http://www.callcentric.com/support/device/d-link
NOTE: Settings listed (other options in brackets)
Telephony Configuration ----------------------
Signaling ToS: 5 (0..7)
RTP ToS: 5 (0..7)
Receive Gain: -3 dB
Transmission Gain: -11 dB
DTMF Relay: RFC2833 (G.711,RFC2833)
TEL Dial Signal: AUTO (AUTO,MANUAL)
Echo Cancel: enabled (enabled,disabled)
VAD: enabled (enabled,disabled)
Digital Timer: 4 sec
Hook Flash: 700 ms
Dial Pulse: PB ( PB,DP(20pps),DP(10pps) )
Call Waiting Alert Tone: enabled (enabled,disabled)
Area Code:
SIP Configuration - Server ------------------
Server FQDN: enabled (enabled,disabled)
IP Address: . . . (only selectable when Server FQDN is disabled)
Domain Name: voip.freephoneline.ca
Port: 5060
Service Domain: voip.freephoneline.ca
URL Format: SIP-URL (SIP-URL,TEL-URL)
User Parameter Phone: enabled (enabled,disabled)
Timer T2: 4 sec (4,8,16,32)
Register Expiration: 3600 sec
Session Expires: 180 sec
Min-SE: 180 sec
Session Expires Refresher: uac (uac,uas)
Codec Priority & Packet Interval
G.711a-law: 5th (no-use,1st,2nd,3rd,4th,5th) 20 ms (10,20,30)
G.711u-law: 4th (no-use,1st,2nd,3rd,4th,5th) 20 ms (10,20,30)
G.723.1: 2nd (no-use,1st,2nd,3rd,4th,5th) 30 ms (30,60)
G.729a: 1st (no-use,1st,2nd,3rd,4th,5th) 20 ms (10,20,30)
G.726: 3rd (no-use,1st,2nd,3rd,4th,5th) 20 ms (10,20,30)
SIP Configuration - User Agent ----------------------------
Same Phone Number: disabled (enabled,disabled)
Index: 1 (1,2)
Phone Number: 1604283xxxx
Display Name: 1604283xxxx
Caller ID Delivery: YES (YES,NO)
Display CID: disabled (enabled,disabled)
User Agent Port: 5060
Authentication Username: 1604283xxxx
Authentication Password: <PASSWORD>
Confirm Password: <PASSWORD>
==================================================================
If there are any further tweaks available I hope others will contribute.
Note that without STUN support the DVG-1120s will not work attached to a NAT server (a typical router) unless appropriate UDP port forwarding and QoS is addressed or the 1120s is located in the DMZ. Generally it should be directly attached to the broadband modem first, and the home router WAN port can be attached to the 1120s "ETHERNET" or LAN port.
Hope this helps!
DJS