Digium G200 Outbound call fail

I am having trouble establishing an outbound call through our PBX using the G200 media gateway.

The gateway is connected as follows:

[PBX] ---{E1/PRI}---> [G200] ---{SIP}---> [Simtex] (SIP provider)

Incoming calls are working fine.
When trying to establish an outgoing call the debug shows:

Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < Protocol Discriminator: Q.931 (8) len=27 Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < TEI=0 Call Ref: len= 2 (reference 21504/0x5400) (Sent from originator) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < Message Type: SETUP (5) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < [04 03 80 90 a3] Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < Bearer Capability (len= 5) [ Ext: 1 Coding-Std: 0 Info transfer capability: Speech (0) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < Ext: 1 Trans mode/rate: 64kbps, circuit-mode (16) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < User information layer 1: A-Law (35) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < [6c 0b 21 80 37 33 35 35 32 36 36 33 38] Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < Calling Number (len=13) [ Ext: 0 TON: National Number (2) NPI: ISDN/Telephony Numbering Plan (E.164/E.163) (1) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < Presentation: Presentation permitted, user number not screened (0) '735526638' ] Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < [7d 02 91 81] Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 < IE: High-layer Compatibility (len = 4) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 -- Making new call for cref 21504 Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 Received message for call 0x102b55b0 on link 0x102c3ce4 TEI/SAPI 0/0 Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 -- Processing Q.931 Call Setup Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 -- Processing IE 4 (cs0, Bearer Capability) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 -- Processing IE 108 (cs0, Calling Party Number) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 -- Processing IE 125 (cs0, High-layer Compatibility) Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 q931.c:8281 post_handle_q931_message: Call 21504 enters state 6 (Call Present). Hold state: Idle Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/sig_pri_new.c:1106 in sig_pri_is_chan_available: -- prioffset 31, logicalspan 0, trunkgroup 1 is NOT in use, NOT out of service, Jul 3 14:37:56 1 asterisk[15825]: DEBUG[15958]: chan_gtw/sig_pri_new.c:1697 in pri_find_empty_chan: Found empty available channel 0/31 Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/sig_pri_new.c:5407 in pri_dchannel: -- Group 1: Extension s@port1 does not exist. Rejecting call from '07xxxx6638'. Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 q931.c:6837 q931_hangup: Hangup other cref:21504 Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 q931.c:6594 __q931_hangup: ourstate Call Present, peerstate Call Initiated, hold-state Idle Jul 3 14:37:56 1 asterisk[15825]: VERBOSE[15958]: chan_gtw/chan.c:4803 in dgm_pri_message: port1 q931.c:6085 q931_release_complete: Call 21504 enters state 0 (Null). Hold state: Idle

Where the line "-- Group 1: Extension s@port1 does not exist. Rejecting call from ‘07xxxx6638’. " stands out as the point of failure.

07xxxx6638 is the sending clid defined on the PBX.

The PBX is a Samsung OfficeServ 7100 using a TEPRIa card configured as E1/PRI.

I can provide more information, please let me know what you would like.

As this is a Digium product issue please contact Digium support[1].

[1] digium.com/support