Jsureal,
On my Obi110, this is how I configured Voice Gateways for making both iNum and SipBroker calls. It is based on this excellent post:
http://www.obitalk.com/forum/index.php?topic=526.0Obi Expert Configuration Menu => Voice Service => Gateways & TrunkGrps
I Used VG6 for SipBrokerName : Sip Broker
AccessNumber : SP1(sipbroker.com) [note: my provider on SP1 allows SIP dialing]
DigitMap : (<*>[x*][x*].|*[x*][x*].)
Test Numbers to Call via SipBroker:
**6 011 188888 connects you with the Sip Broker test announcement.
**6 10085 18005551212 tollfree directory assistance (via
tollfree.alcazarnetworks.com)
**6 8412 18005551212 tollfree directory assistance (via
sip.tollfreegateway.com)
**6 8412 18004444444 tollfree MCI callerid echo back (via
sip.tollfreegateway.com)
I Used VG7 for iNum callingName : iNum
AccessNumber : SP1(sip.inum.net) [note: my provider on SP1 allows SIP dialing]
DigitMap : (<8835100>xxxxxxxx|8835100xxxxxxxx)
Test iNum Numbers:
NOTE: Use only the last 8 digits of the iNum number (8835100 will be prepended for you with the above DigitMap).
**7 00000091 connects you with the iNum echo test.
**7 00000093 connects you with the iNum callerid readback
You'll also need to modify the Phone Port DigitMap and the PHONE Port OutboundCallRoute per the forum link above to add the Mvg6 and Mvg7 parts.
Of course, the easiest method in your case, since your relative will also have an Obi, is to simply dial device to device (e.g., **9 200 999 999)