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Written by a Tribune Staff Writer
Typed by the $muggler
===== Phrack Magazine presents Phrack 16 =====
===== File 2 of 12 =====
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BELLCORE Information by The Mad Phone-man
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So, you've broken into the big phone box on the wall, and are looking at a
bunch of tags with numbers and letters on them. Which one is the modem line?
Which one is the 1-800 WATS line? Which one is the Alarm line? Bell has a
specific set of codes that enable you to identify what you're looking at.
These are the same codes the installer gets from the wire center to enable him
to set up the line, test it, and make sure it matches the customers order.
Here are some extracts from the Bellcore book.
First lets take a hypothetical line number I'm familiar with:
64FDDV 123456
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The serial number format:
Prefix + service code + modifier + serial number +
digits: 1,2 3,4 5,6 7,8,9,10,11,12 continued
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Suffix + CO assigning circuit number + segment
digits: 13,14,15 16,17,18,19 20,21,22
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The important shit is in the 3rd thru 6th digit.
SERVICE CODES Intra or Inter LATA Block 1-26
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AA- Packet analog access line
AB- Packet switch trunk
AD- Attendant
AF- Commercial audio fulltime
AI- Automatic identified outward dialing
AL- Alternate services
AM- Packet, off-network access line
AN- Announcement service
AO- International/Overseas audio (full time)
AP- Commercial audio (part time)
AT- International/Overseas audio (part time)
AU- Autoscript
BA- Protective alarm (CD)
BL- Bell & lights
BS- Siren control
CA- SSN Access
CB- OCC Audio facilities
CC- OCC Digital facility-medium speed
CE- SSN Station line
CF- OCC Special facility
CG- OCC Telegraph facility
CH- OCC Digital facility high-speed
CI- Concentrator Identifier trunk
CJ- OCC Control facility
CK- OCC Overseas connecting facility wide-band
CL- Centrex CO line
CM- OCC Video facility
CN- SSN Network trunk
CO- OCC Overseas connecting facility
CP- Concentrator identifier signaling link
CR- OCC Backup facility
CS- Channel service
CT- SSN Tie trunk
CV- OCC Voice grade facility
CW- OCC Wire pair facility
CZ- OCC Access facility
DA- Digital data off-net extension
DB- HSSDS 1.5 mb/s access line
DF- HSSDS 1.5 mb/s hub to hub
DG- HSSDS 1.5 mb/s hub to earth station
DH- Digital service
DI- Direct-in dial
DJ- Digit trunk
DK- Data link
DL- Dictation line
DO- Direct-out dial
DP- Digital data-2 4 kb/s
DQ- Digital data-4 8 kb/s
DR- Digital data-9.6 kb/s
DW- Digital data-56 kb/s
DY- Digital service (under 1 mb/s)
EA- Switched access
EB- ENFIA II end office trunk
EC- ENFIA II tandem trunk
EE- Combined access
EF- Entrance facility-voice grade
EG- Type #2 Telegraph
EL- Emergency reporting line
EM- Emergency reporting center trunk
EN- Exchange network access facility
EP- Entrance facility-program grade
EQ- Equipment only-(network only) assignment