T23NAM Redesign
User
Manual
(STRLNK2P)
Table of Contents
1 Introduction .......................................................................................................................................... 3
1.1 Purpose and Scope.............................................................................................................................. 3
1.2 Product Description ............................................................................................................................ 3
1.3 Power and Grounding ......................................................................................................................... 4
1.3.1 Power and Grounding .................................................................................................................. 4
1.3.2 Backup Battery (BUB)................................................................................................................... 5
1.3.3 DCM Interface to External LTE/WCDMA/GSM Antennas........................................................ .... 5
1.3.4 DCM Interface External Fault Detection ....................................................................................... 5
1.4 WiFi ..................................................................................................................................................... 6
1.4.1 WiFi internal Antenna .................................................................................................................. 6
1.5 Connectors .......................................................................................................................................... 6
1.5.1 USB Connector ............................................................................................................................. 6
1.5.2 RF Connector................................................................................................................................ 7
1.5.3 BUB Connector............................................................................................................................. 7
1.6 TCU Module Label............................................................................................................................... 8
1.7 TCU Antenna Transmit Area ............................................................................................................... 8
2 Vehicle Installation Guidelines.............................................................................................................. 9
3 Regulatory Compliance Notes............................................................................................................. 10
4 External Antenna Requirements for use with T23NAM Redesign ...................................................... 11
5 Instructions to OEMS .......................................................................................................................... 11
1 Introduction
The Data Communication Module(DCM) integrates an on-board cellular communication module with
a WiFi hotspot functionality and interacts with remote call/data centers to provide valuable services
to the vehicle customer.
1.1 Purpose and Scope
This document aims to describe the device operating principles and provide installation instruction to
OEM to insure safe use of the device.
1.2 Product Description
Subaru T23NAM Redesign is a proprietary DCM designed and manufactured by Continental
Automotive. The DCM includes an integrated Network Access Device (NAD) that is also designed and
produced by Continental.
The DCM will be installed as a vehicle mounted wireless devices into Subaru vehicles during the OEM’s
factory assembly process and will not be accessible without use of special tools.
The DCM functionalities are accomplished by 2G/3G/4G technologies (Voice & Data) and defined
service feature.
The DCM comprises of the following subsystem components:
- Power supply
- Vehicle micro-controller (VuC)
- Network Access Device (NAD)
- Vehicle interface / communications
- Battery
1.3 Power and Grounding
The DCM is designed to operate via an unfiltered 5 A fused input from the vehicle battery: Vbatt
Ground return is through a single ground pin: GND
1.3.1 Power and Grounding
Operating voltage range is provided in the following table.
Table 3.1.1 DCM Operating Voltage Conditions
V
o
lta
g
e
Ra
ng
e
(V
d
c
)
S
u
b
s
y
st
e
m
O
p
erating
C
o
nd
iti
o
n
s
9
.0
<
V
BA
T
T
<
16
.
0
N
o
r
m
al
o
p
e
rat
i
o
n
. TCU
i
s
f
u
lly
fu
n
cti
o
n
al
The VBATT connection (pin 17) shall support up to 2.5A current draw with 4.5A peaks. Vehicle wire
gauge must be chosen to support this current load with less than 0.5V drop between battery terminal
and this pin.
1.3.1.1 VBatt values out of normal range
The threshold voltage transition from Vehicle Battery to Backup Battery:
If the VBATT voltage transitions downward from >8.6V to <7.3V and BUB voltage is >2.0V, the DCM shall
begin using the BUB as a power source (i.e. switch to BUB), or, if no BUB is present, become
UNPOWERED.
The threshold voltage transition from Backup Battery to Vehicle Battery:
If the VBATT voltage transitions upward from <7.7V to >9.0V AND BUB voltage > 2.0V, the DCM shall
begin using the VBATT as a power source (i.e. switch to +B). The DCM shall continue to be OPERATING
ON VBATT until the conditions of DCM_02552 or DCM_00031 are met.
1.3.2 Backup Battery (BUB)
BUB refers to the Back-up Battery installed in the DCM; the DCM is shipped to Subaru with a BUB
installed. This battery can be used to power the DCM if the main vehicle battery is lost.
The BUB has no effect on DCM feature operation when DCM is running on MAIN BATTERY, i.e. when
MAIN BATTERY is at least 7V.
The BUB used on the DCM has the following characteristics
Technology: LiFePO4 (Lithium-Iron)
Rated Capacity: 1100mAh
Nominal Voltage: 3.2V
Temperature: Charge 0 to 45C, Discharge -30 to 60C.
Charging Voltage (Max): 3.81V
Minimum End of Discharge Voltage: 2.0V
Protection Circuit Required : No
1.3.3 DCM Interface to External LTE/WCDMA/GSM Antennas
The DCM has FAKRA connectors to which external LTE/GSM antennas may be connected.
1.3.4 DCM Interface External Fault Detection
For vehicles that are configured to use External LTE/GSM Antennas, the DCM has the capability to
determine if the External Antenna is connected and to log a fault if it determines that the External
Antenna is not connected (circuit open fault). It is also preferred that the DCM detect and log if the
External Antenna is shorted to ground.
1.4 WiFi
The DCM supports IEEE 802.11a/b/g/n/ac 2.4/5GHz WiFi.
1.4.1 WiFi internal Antenna
The DCM contains integrated pcb type F dual band antenna with the following maximum gain
Frequency MAX Gain
2442 MHz 3.14 dBi
5220 MHz 0.68 dBi
5785 MHz 1.94 dBi
1.5 Connectors
1.5.1 USB Connector
2
1
4
3
Shie
ld
USB Connector – pin details
(View from mating
side)
Pin No. Terminal Name Terminal Description Input(I) / Output(O)
U
S
B
–
p
in
1
U
S
B+
U
S
B
D
+
I/O
U
S
B
–
p
in
2
U
S
BS
U
S
B S
h
ield
G
N
D
G
N
D
U
S
B
–
p
in
3
U
S
BVCC
U
S
B
+5
V
S
upp
ly
PS
U
S
B
–
p
in
4
U
S
B
-
U
S
B
D
-
I/O
1.5.2 RF Connector
RF Connector – pin details
(View from mating
side)
Terminal Name Terminal Description Input(I) / Output(O)
Primary
TEL
M
A
I
N
anten
n
a
sig
n
al
I
TEL
M
A
I
N
anten
n
a
G
N
D
G
N
D
Secondary
TEL
SUB
anten
n
a
si
gn
al
I
TEL
SUB
anten
n
a
G
N
D
G
N
D
GPS
G
N
SS
anten
n
a si
gn
al
I
G
N
SS
anten
n
a G
N
D
G
N
D
1.5.3 BUB Connector
CONNECTOR
Pin Number
Signal Name
BUB
connector
Molex 43650-
0323
1
VBUB
2
BUB NTC
3
GND
M1
Not
Connected
M2
Not Connected
1.6 DCM Module Label
The DCM labeling shall comply with the regulatory homologation compliance mark(s) that are
required by law in those countries. Artwork for Subaru T23NAM Redesign is shown below:
The module is marked with the Automotive OEM company trademark, engineering part number, and
supplier code.
1.7 DCM Antenna Transmit Area
For DCM variants that utilize an internal antenna, the module housing shall not be made of a metal,
nor contain a metal coating, that inhibits the transmission, or reception, of cellular signals in the areas
specified in the diagrams below.
Wi-Fi Antenna
The DCM is designed to allow the Wi-Fi antenna signal to propagate out of the top, bottom, and sides
of the module.
2 Vehicle Installation Guidelines
Normal operating conditions are between -30°C to +85°C.
The sheet metal cover is designed to be a heat sink. A gap between the heat sink and the mounting
surface is recommended to facilitate heat transfer out of the module. Exceptions can be made if the
module is mounted to a surface that can help facilitate heat transfer such as a large aluminum body
panel.
The device does not have sealed connectors.
It is designed to meet Class I water intrusion conditions (no drip test required), so it should not be
placed in area that can get wet.
Continental recommends that the automotive OEM uses the mating harness supplier’s
recommendations for the keep out zone around the connectors to ensure proper mating of each
connector.
Changes or modifications to this system by other than a facility authorized by Continental could void
authorization to use this equipment.
The device and its antennas must be installed to provide a separation distance of at least 20 cm from
all persons and must not be co-located or operate in conjunction with any other antenna or
transmitter.
3 Regulatory Compliance Notes
FCC: This device complies with Part 15, Part 22(H), Part 24(E) and Part 27 of the FCC Rules. The FCC ID for
this device is LHJ-STRLNK2P. It also contains a certified module with FCC ID: LHJ-BL28NARD2.
15.19
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1) this device may not cause harmful interference and
2) this device must accept any interference received, including interference that may cause undesired
operation of the device.
15.105
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
15.21
Changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate the equipment.
Industry of Canada:
This device complies with Industry Canada’s license-exempt RSSs. Operation is subject to the following
two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may cause undesired operation
of the device.”
« Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts
de licence. L'exploitation est autorisée aux deux conditions suivantes :
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est
susceptible d'en compromettre le fonctionnement. »
Caution: Exposure to Radio Frequency Radiation
1. To comply with the Canadian RF exposure compliance requirements, this device and its antenna
must not be co-located or operating in conjunction with any other antenna or transmitter.
2. To comply with RSS 102 RF exposure compliance requirements, a separation distance of at least
20 cm must be maintained between the antenna of this device and all persons.
Attention: exposition au rayonnement radiofréquenc
1. Pour se conformer aux exigences de conformité RF canadienne l'exposition, cet appareil et son
antenne ne doivent pas être co-localisés ou fonctionnant en conjonction avec une autre antenne
ou transmetteur.
2. Pour se conformer aux exigences de conformité CNR 102 RF exposition, une distance de
séparation d'au moins 20 cm doit être maintenue entre l'antenne de cet appareil et toutes les
personnes.
4 External Antenna Requirements for use with T23NAM Redesign
The T23NAM Redesign DCM is for use with external antennas ONLY, except for Wi-Fi which uses an
internal antenna.
For all LTE/WCDMA operating bands the maximum antenna gain including cable loss shall not
exceed the following values:
GSM 850: 1 dBi
GSM 1900: 2 dBi
WCDMA Band 2: 2 dBi
WCDMA Band 4: 2 dBi
WCDMA Band 5: 1 dBi
LTE Band 2: 2 dBi
LTE Band 4: 2 dBi
LTE Band 5: 1 dBi
LTE Band 7: 2 dBi
LTE Band 12: 2 dBi
5 Instructions to OEMS
Continental must instruct the automotive OEM and provide them to include the following information
into the car user’s manual (i.e. for the DCM):
1. End-users must be provided with transmitter/antenna installation requirements and operating
conditions for satisfying RF exposure compliance:
2. A separate section should clearly state “FCC RF Exposure requirements:”
3. Required operating conditions for end users.
4. The antenna used with this device must be installed to provide a separation distance of at least
25cm from all persons, and must not transmit simultaneously with any other transmitter, except
in accordance with FCC multi-transmitter product procedures.
5. The Maximum ERP/EIRP and maximum antenna gain required for compliance with Parts 15,
22H, 24E, and 27.
6. Clear instructions describing the other party’s responsibility to obtain station licensing.
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