Thank you Donb01 for your reply,
At the same room there is a identical phone working, and my colleage tried to register the another phone and we got the same response from the phone ... probably invalid pin.
Where can I check the PIN?
I leave some more infos about the set:
DISP-SBCSU:3532,TERMDATA;
H500: AMO SBCSU STARTED
------------------------------- USER DATA -----------------------------------
STNO =3532 OPT =CMI COS1 =7 DPLN =0 SPDI =N
MAINO =3532 CONN = COS2 =2 ITR =0 SPDC1 =0
PEN = 1- 3- 79- 92 LCOSV1 =7 COSX =0 SPDC2 =1
INS =Y STD =15 LCOSV2 =2 CBKBMAX=5
SECR = LCOSD1 =7 DSSTNA =N RCBKB =N
SSTNO =N DIGNODIS=N LCOSD2 =2 DSSTNB =Y RCBKNA =N
TRACE =N HFREE = ASYNCT =500 PERMACT= CBKNAMB=
ALARMNO = HMUSIC =0 TEXTSEL=
EXTBUS = REP =0 OPTICOM= OPTISPA: DLAUT =
IDCR =N OPTICA = OPTIS0A: DLMAN =
HEADSET = OPTIDA = OPTIABA: PRIO =
HSKEY = ATMADR = VPI =
DFSVCANA= TFAGRP = PATTERN= VCI =
DVCFIG =RADIO TSI =1 SOPTIDX= SPROT =
DOPTIDX= DPROT =
FOPTIDX= FPROT =
TOPTIDX= TPROT =
VOPTIDX= VPROT =
------------------- ACTIVATION IDENTIFIERS FOR FEATURES ---------------------
FWDS :N FWDT :N FWDV :N FWDF :N FWDD :N
HTOS :N HTOT :N HTOV :N HTOF :N HTOD :N
DND :N VCP :Y CWT :N TCLOGIN:
--------------------- FEATURES AND GROUP MEMBERSHIPS ------------------------
ESSTN :
PUGR :6 HUNTING GROUP : N
ANI : NIGHT OPTION : N ASSOCIATED STN : N
ACD ATTR:
-----------------------------------------------------------------------------
***********************************
DISP-BCSU

EN,1,3,79;
H500: AMO BCSU STARTED
PEN | STATUS DEVTYPE COFIDX
---------------------+---------------------------------
1. 3. 79. 0 | CONNECTED
1. 3. 79. 1 | CONNECTED
1. 3. 79. 2 | CONNECTED
1. 3. 79. 3 | CONNECTED
1. 3. 79. 4 | CONNECTED
1. 3. 79. 5 | CONNECTED
...
1. 3. 79. 85 | NOT CONNECTED
1. 3. 79. 86 | NOT CONNECTED
1. 3. 79. 87 | NOT CONNECTED
1. 3. 79. 88 | CONNECTED
1. 3. 79. 89 | CONNECTED
1. 3. 79. 90 | CONNECTED
1. 3. 79. 91 | CONNECTED
1. 3. 79. 92 | CONNECTED
1. 3. 79. 93 | CONNECTED
1. 3. 79. 94 | CONNECTED
1. 3. 79. 95 | CONNECTED
1. 3. 79. 96 | CONNECTED
1. 3. 79. 97 | NOT CONNECTED
1. 3. 79. 98 | CONNECTED
1. 3. 79. 99 | CONNECTED
...
***********************
** .LTG 1.LTU 3.079 SLC16 Q2151-X300 READY
NOTE: THE STATE 'READY' FOR SWITCHING UNIT DEVICES DOES NOT INDICATE
WITH ANY RELIABILITY THAT THE UNIT IS INDEED READY FOR OPERATION.
BASE STATION: IS ALSO IN 'READY' STATUS DURING THE LOAD PROCEDURE
RADIO UNIT: IS ALSO IN 'READY' STATUS WHILE OUTSIDE THE RADIO RANGE
STNO INPUT CCT LINE STNO SI BUS TYPE
3530 090 495 OPTI ONLY READY
MULTLINE 8. . . . . . . . . . . . . . .READY
001 SUBUNIT . . . . . DIGITE MAIN READY
(RADIO )
LINE: 495 STNO: 3530 SI: VOICE
001 . . . . . . . . DIGITE SUB A READY
002 . . . . . . . . DIGITE SUB A READY
003 . . . . . . . . DIGITE SUB C READY
STNO INPUT CCT LINE STNO SI BUS TYPE
3531 091 496 OPTI ONLY READY
MULTLINE 8. . . . . . . . . . . . . . .READY
001 SUBUNIT . . . . . DIGITE MAIN READY
(RADIO )
LINE: 496 STNO: 3531 SI: VOICE
001 . . . . . . . . DIGITE SUB A READY
002 . . . . . . . . DIGITE SUB A READY
003 . . . . . . . . DIGITE SUB C READY
STNO INPUT CCT LINE STNO SI BUS TYPE
3532 092 497 OPTI ONLY READY
MULTLINE 8. . . . . . . . . . . . . . .READY
001 SUBUNIT . . . . . DIGITE MAIN READY
(RADIO )
LINE: 497 STNO: 3532 SI: VOICE
001 . . . . . . . . DIGITE SUB A READY
002 . . . . . . . . DIGITE SUB A READY
003 . . . . . . . . DIGITE SUB C READY
**************************