Tandem numbering configuration

[robi1306]

G350 with ISDN trunk to PSTN, DID numbering, 3 digit extensions, 6xx.

H323 tie trunk with IP Office, 63x & 64x extensions are located at the IPO and routed via AAR.

Calls from the IPO to G350 show number & name.

When calling an external number from the IPO, the ISDN pilot number is shown, instead of the extension DID number.

As I understand this is configured with tandem numbering, but I haven't been able to get it to work.

I activated modify tandem calling number at the IPO trunk, but I'm not sure what kind of entry do I have to add at the tandem table.

Here is a list trace at the ISDN trunk, when I make an external call from IPO extension 632. The IPO sends all digits to the G350, 0 is G350 ARS access code.

11:08:06 dial 0628113 route:ARS
11:08:06 route-pattern 1 preference 1 cid 0x16
11:08:06 seize trunk-group 1 member 3 cid 0x16
11:08:06 Setup digits 628113
11:08:06 Calling Number & Name 632 NO-CPName
11:08:06 Proceed trunk-group 1 member 3 cid 0x16
11:08:06 Alert trunk-group 1 member 3 cid 0x16
11:08:06 G711A ssff ps:20 rn:1/1 192.168.99.253:49790 192.168.99.251:2050
11:08:06 xoip: faxff modemff ttyff 192.168.99.251:2050 uid:0x50011
11:08:09 active trunk-group 1 member 3 cid 0x16
VOIP data from: 192.168.99.251:2050
11:08:17 Jitter:0 0 0 0 0 0 0 0 0 0: Buff:8 WC:7 Avg:0
11:08:17 Pkloss:0 0 0 0 0 0 0 0 0 0: Oofo:0 WC:0 Avg:0
11:08:18 idle trunk-group 1 member 3 cid 0x16

Please help me