Raices

I have a dilema. Seems, somewhere in a outgoing call initiated from a t-1 channel (conference bridge span), a caller id of a user is being sent.
As the call is not initiated from a set i had to check each t1 channel until i found the active test call. Then I traced the test call and this is the result:
.trad 15 13

ACTIVE TN 015 13
ORIG 015 13 TIE RMBR 4 62
TERM 051 14 DID RMBR 34 83
DIAL DN 912028413xxx (changed for privacy)
MAIN_PM ESTD
TALKSLOT ORIG 25 TERM 22 JUNCTOR ORIG0 TERM2
EES_DATA:
NONE
QUEU NONE
CALL ID 0 4764 (not the id how at called party set)


---- ISDN PRA CALL (TERM) ----
CALL REF # = 14
BEARER CAP = VOICE
HLC =
CALL STATE = 10 ACTIVE
CALLING NO = NUM_PLAN:UNKNOWN TON:UNKNOWN ESN:UNKNOWN
CALLED NO = 12028413xxx NUM_PLAN:E164 TON:NATIONAL ESN:NPA
PDCA 1 PAD 0 0 PCML MU MU
PDCA 1 PAD 0 0 PCML MU MU

Where Rte 4 is the conf bridge.
TYPE RDB
CUST 00
ROUT 4
DES CONF_BRIDGE_5104
TKTP TIE
NPID_TBL_NUM 0
ESN NO
CNVT NO
SAT NO
RCLS EXT
VTRK NO
DTRK YES
BRIP NO
DGTP DTI
ISDN NO
DSEL 3VCE
PTYP DTT
AUTO NO
DNIS NO
ICOG IAO
PREM NO
SRCH LIN
TRMB YES
STEP
ACOD 5104
TARG
CLEN 1
BILN NO
OABS
INST
ANTK
SIGO STD
STYP SDAT.......

DES CONF
TN 015 01
TYPE TIE
CUST 0
TRK DTI
PDCA 1
PCML MU
NCOS 13
RTMB 4 1
TGAR 13
SIGL EM4
STRI/STRO WNK WNK
SUPN YES
AST NO
IAPG 0
CLS UNR DTN ECD WTA LPR APN THFD HKD
P10 VNL
TKID

Rte rte 34 is an MCI PRI /TYPEID: ISDN=Yes, PRA, D250, PNI=0, NCNA=Yes, NCRD=No, 3VCE, IAO, LIN

NET_DATA
CUST 00
OPT RTA
AC1 INTL NPA SPN NXX LOC
AC2
FNP YES
ISDN YES
VPNI 0
PNI 1
PINX_DN
MBG 0
BSGC 65535
PFX1
PFX2
HLOC
LSC
RCNT 5
PSTN NO
TNDM 15
PCMC 15
SATD 1
OCLI NO
DITI NO
TRNX YES
EXTT YES
FTOP FTLY
VNR NO
NIT 8
NAS_ATCL NO
NAS_ACTV NO
FOPT 14
CNTC
NATC


At the called party's end I saw the erroneous user dn NPA-NXX-DN. To my knowledge, nowhere is that set dn attached to the conference bridge span (T1 channels) or set in the conf bridge as a caller dn. Bridge just picks a channel and inititates the call (rte 4).
Any thoughts?
Thanks