BFS works regardless of DN type in use, see TNBs below, first is reception phone, second is a phone being monitored. The BFS works for both the SCR an MCR keys on the monitored phone.
And your are correct, you cannot mix a DN as both a MCR and SCR. It must be one or the other.
TN 004 0 00 02
TYPE 3904
CDEN 8D
CUST 0
KBA 1
FDN 57000
TGAR 1
LDN NO
NCOS 4
SGRP 0
RNPG 0
SCI 0
SSU 0000
LNRS 16
XLST
CLS UNR FBD WTA LPR MTD FNA HTA TDD HFA GRLD CRP
MWA RMMD SMWD AAD IMD XHD IRA NID OLA VCE DR
POD DSX VMD CMSD SLKD CCSD SWD LNA CNDA
CFTD SFD MRD DDV CNID CDCA MSID DAPA BFED RC
ICDD CDMD LLCN MCTD CLBD AUTU
GPUD DPUD DNDA CFXA ARHD FITD CLTD ASCD
CPFA CPTA ABDD CFHD FICD NAID BUZZ AGRD MOAD
DDGA NAMA
DRDD EXR0
USRD ULAD RTDD RBDD RBHD PGND OCBD FLXD FTTC
CPND_LANG ENG
RCO 0
HUNT 57000
LHK 0
LPK 4
PLEV 02
AST
IAPG 0
AACS NO
ITNA NO
DGRP
MLWU_LANG 0
MLNG ENG
DNDR 0
KEY 00 SCR 58123 0 MARP
CPND
NAME ********
XPLN 13
DISPLAY_FMT FIRST,LAST
01 SCR 59123 0 MARP
CPND
NAME ********
XPLN 13
DISPLAY_FMT FIRST,LAST
02 MCR 57989 0
CPND
NAME *******
XPLN 13
DISPLAY_FMT FIRST,LAST
03 ADL 16
04 MCR 58888 0
CPND
NAME *****
XPLN 13
DISPLAY_FMT FIRST,LAST
05 ADL 16
06 ADL 16
07 ADL 16
08 ADL 16
09 ADL 16
10 ADL 16
11 ADL 16
12
13
14
15
16 MWK 57000
17 TRN
18 AO6
19 CFW 16 58737
20 RGA
21 PRK
22 RNP
23
24 PRS
25 CHG
26 CPN
27 CLT
28 RLT
29
30
31
32 BFS 004 0 00 09
33 BFS 004 0 00 15
34 BFS 004 0 00 14
35 BFS 004 0 00 10
36 BFS 004 0 00 12
37 BFS 004 0 00 13
38 BFS 005 0 00 02
39 BFS 005 0 00 00
40 BFS 005 0 00 04
41 BFS 007 0 00 10
42 BFS 006 0 00 14
43 BFS 007 0 00 09
44 BFS 004 0 00 06
45 BFS 004 0 00 05
46 BFS 012 0 00 13
47 BFS 012 0 00 09
48 BFS 020 0 00 00
49 BFS 004 0 00 03
50 BFS 004 0 00 08
51 BFS 007 0 00 01
52 BFS 012 0 00 11
53
DATE 8 APR 2015
TN 004 0 00 09
TYPE 3904
CDEN 8D
CUST 0
FDN 57000
TGAR 1
LDN NO
NCOS 4
SGRP 0
RNPG 0
SCI 0
SSU 0000
LNRS 16
XLST
CLS UNR FBD WTA LPR MTD FNA HTA TDD HFA GRLD CRP
MWA RMMD SMWD AAD IMD XHD IRA NID OLA VCE DR
POD DSX VMD CMSD SLKD CCSD SWD LNA CNDA
CFTD SFD MRD DDV CNID CDCA MSID DAPA BFED RC
ICDD CDMD LLCN MCTD CLBD AUTU
GPUD DPUD DNDA CFXA ARHD FITD CLTD ASCD
CPFA CPTA ABDD CFHD FICD NAID BUZZ AGRD MOAD
DDGA NAMA
DRDD EXR0
USRD ULAD RTDD RBDD RBHD PGND OCBD FLXD FTTC
CPND_LANG ENG
RCO 0
BFTN 004 0 00 02
012 0 00 10
HUNT 57000
LHK 0
LPK 3
PLEV 02
AST
IAPG 0
AACS NO
ITNA NO
DGRP
MLWU_LANG 0
MLNG ENG
DNDR 0
KEY 00 SCR 58733 0 MARP
CPND
NAME ********
XPLN 13
DISPLAY_FMT FIRST,LAST
01 SCR 59733 0 MARP
CPND
NAME *******
XPLN 13
DISPLAY_FMT FIRST,LAST
02 MCR 57989 0
CPND
NAME *****
XPLN 13
DISPLAY_FMT FIRST,LAST
03 MCR 57991 0
CPND
NAME ******
XPLN 13
DISPLAY_FMT FIRST,LAST
04 MCR 58888 0
CPND
NAME *****
XPLN 13
DISPLAY_FMT FIRST,LAST
05 ADL 16
06 ADL 16
07 ADL 16
08 ADL 16
09 ADL 16
10 ADL 16
11 ADL 16
12
13
14
15
16 MWK 57000
17 TRN
18 AO6
19 CFW 16 57989
20 RGA
21 PRK
22 RNP
23
24 PRS
25 CHG
26 CPN
27 CLT
28 RLT
29
30
31
DATE 7 AUG 2013