EN735 Interface Leads 68735 Porsche Boxter.pub


EN735 Interface Leads 68735 Porsche Boxter.pub

Interface Leads

4th. Activate the phone Input in the radio.

CDR-21: Always active.

CDR-22: Hold down arrow button to activate menu, select phone to ON.

CDR-23 & CDR-24: Press and hold menu button, simultaneously press

NEXT button to access menu scroll through to “MUTE ON” and change to


Interface Leads

Instruction for

Line-In cable 68735 for

Porsche 911, Cayenne, Boxster & Chayman

5th. Now you can connect the carkit. Please use a carkit Interface

adaptor to connect The carkit to the Line-In cable. Note: Please check

the configuration of the Ignition plus and the constant plus as they in

some models can be switched. If The ignition and the constant plus is

switched it can be corrected by switching the two bullet connectors (see

below). If no ignition can be found in the ISO connector please connect

the blue wire with the female bullet to an ignition source found elsewhere.

6th. Refit the radio.

7th. After installation please adjust the telephones volume level to

it´s middle position. Make a call with the phone connected to the

carkit, while dialling please adjust the radio volume level as described

in the radios instruction manual.

When the Interface Lead is installed correctly it will redirect your call

through the car front speakers and allow the telephone volume to be

adjusted using the radios volume control.

Made in Denmark by

Kram Telecom A/S

Made in Denmark by

Kram Telecom A/S


Interface Leads

Interface Leads

Product description

Line-In cable 68735 for

Porsche 911, Cayenne, Boxster & Chayman

Interface Leads are used for car stereos with a Line-In function

or VDA preparation. It enables the use of the car speakers

when answering/making calls from your cell phone. Thereby

using the radios built-in mute function.

Speaker-function: This is achieved by connecting the carkit directly

to the cars Line-In input/VDA connector. By using the

radios built-in relays the telephone conversation is sent

through the car speakers while the radio is muted. This way

you will achieve a perfect hands free sound without interference

from the car radio.

For a complete cable-set two item no. is required. The first is

a car-specific Interface Lead. The second is a carkit-specific

carkit adaptor cable.

Power supply of the carkit: All Interface Leads are delivered

with a power connector for the carkit. That way you avoid

cutting the cars wiring loom.

Please check the radio instruction manual for special issues

regarding the connection and set-up of the radio when connecting

a carkit.

See our complete Interface program on


Installation description

Line-In cable 68735 for

Porsche 911, Cayenne, Boxster & Cayman

1st. Remove the radio and disconnect the ISO connectors from the rear of

the radio. Insert the Interface lead between the connectors on the radio

and the connectors on the cars wiring loom.

2nd. Now you will need to connect the

yellow mute wire. Start by disconnecting

the small mute-adaptor labelled

“MUTE 4” from the mute wire. Afterwards

connect the mute wire to the

red/white wire labelled “MUTE 3”:

3rd. Now the white and the black wire will need to be connected to the

radios telephone input. The radios telephone input is found in the 20 pin

mini ISO slot on the back of the radio. Where to connect the pins depends

on the radio model nr. Please see the diagram below:

Radio nr. CDR-21 CDR-22 CDR-23/24

White Pin 1 Pin 13 Pin 7



1 4


3 6


Pin 2 Pin 14 Pin 12










20 pin Mini ISO


The Connector is seen from the cable entry side.

If there is no plug in the radio where the wires should be inserted please

insert one of the mini iso plugs delivered with the cable. Warning: Be

sure to connect the black and the white wire to the right positions, else

damage to the radio may occur.

(Continues on next page)




17 20


Pin 7

Pin 12

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