1. NSK 200 GSM Secure Telephone, NSK 201 DECT Single Base Station and
(NDLO/CIS)
NSK 200 GSM Secure Telephone,
NSK 201 DECT Single Base Station and
NSK 250 Secure Management Centre

2. Conversations up to NATO SECRET
Features of the NSK 200
Conversations up to NATO SECRET
GSM-GSM
GSM-DECT
DECT-DECT

3. GSM Transmission channels
Encrypted data channel
Voice transmission
Data transmission
Is used towards NSK 200
Plaintext speech channel
As ordinary GSM/DECT
Used between all other phones
SMS can only be sent as plaintext

4. GSM/DECT Data transmission
DECT/PSTN
28,8 kb/s
IrDA
GSM/PSTN
9,6 kb/s
IrDA
Encrypted File-transfer NATO SECRET

5. NSK 200 - Technical details
Dimensions: 56 x 140 x 30 mm
Weight: g
GSM phase 2: Dual band 900/1800 MHz
Battery capacity: mAh
Stand-by-time: Approx. 70 hours
Operation time: Approx. 3 hours
Data Interface: Infrared, IrDA
Data Speed: GSM: 9,6 kbit/s
DECT: up to 28,8 kbit/s
Security: NATO UNCLASSIFIED
NATO RESTRICED
NATO CONFIDENTIAL
NATO SECRET

6. NSK 200 Overview Menu-wheel IrDA Interface Smart Card Interface
Quick-menu
Smart Card Interface
Hands-free Contact
Battery Charger

7. Accessories NSK 200 bracket for car Car charger
Hands-free combined w/external antenna
Tabletop charger
Portable charger 220V
DECT Base station w/connection to PSTN, analogue line

8. Features of the NSK 200
Encrypted speech is transmitted using the GSM asynchronous transparent data service
The GSM net performs interleaving of data packets, which results in a minor delay when using encrypted speech
Encrypted speech and data
Plaintext speech and data
Plaintext SMS
Encrypted SMS is not supported

9. Digital Enhanced Cordless Telecommunications (DECT) SUB
Red LED (call/registration)
Green LED (power)
Registration button
PSTN (Analogue line)
Power

10. Digital Enhanced Cordless Telecommunications (DECT) SUB
Public network

11. Features of the DECT SUB
The DECT SUB, NSK 201, is mainly used in areas without GSM coverage, connected to the PSTN by an analogue line
The NSK 200 must be registered in the DECT SUB before making calls
This is done by activating registration menu in the NSK 200 and pressing the Registration button on the SUB

12. Features of the DECT SUB
Encrypted speech and data
Plaintext speech and data
NSK 200 supports 28,8 kbps for data calls in DECT mode.

13. (Other Service Provider)
Security Management Centre (SMC)
OSP SMC
(Other Service Provider)
SMC

14. Features of the SMC
The main purpose of the SMC is to distribute traffic keys to the SPs (Secure Phones) in the system.
The SMC is configured as a dual SMC.
The SMC includes a database comprising all customer information.
SMC can be connected in a network to other OSP (Other Service Provider) SMCs.

15. Key Management Traffic Key Can be fetched from everywhere Traffic Key
NSK 200 can be loaded with both Traffic Key
and Group Keys
Traffic Key
Can be fetched from everywhere
Traffic Key
Can be fetched from everywhere
Group Key
Has to be loaded by Crypto Custodian
Only valid for a minor group

16. Security Requirements
The user of NSK 200 shall be familiar with National Security Requirements:
General information of the NSK 200 and security classification.
Physical Security of NSK 200
Be aware threat of acoustic eavesdropping
Use of infrared transmission
How the Access Card is functioning
How to clear key memory in NSK 200
Emergency destruction of the NSK 200
Breach of Security.
Two SDIPs (User and System) under publication

17. How to use NSK 200 Switch on the phone Insert CIK and press ”OK”
Encr. mode
:41
N Telenor
Last No Ph.book
Enter
PIN1
Ok Skip
You can now
remove CIK Ok
Please wait,
communicating
with SC…
Insert CIK
Ok Skip
****
Remove CIK (insert the PIN code)
Ready for use in encrypt. mode

18. How to make encrypted call ?
NSK 200 in Encrypted Mode:
Three ways to make a call:
Dial the number directly
Quick code buttons
Via Phone Book
NATO RESTRICTED
1:47
Client Name
Choice End
Encr. mode
:41
N TELENOR
Last No Ph.book
Encrypted speech
Client Name
Connecting
End
Via Phone Book, select person:
Select number, press ”Call”:
A voice is announcing security level of the call twice, than
the connection is established:

19. How to make plaintext call ?
NSK 200 in Plaintext Mode:
Three ways to make a call:
Dial the number directly
Quick code buttons
Via Phone Book
Plaintext mode
Call Delete
Plain speech
Connecting
Choice End
Make plain call
Ok Cancel
Encrypion mode
:41
N TELENOR
Latest Ph.book
Select ”Make plain call” in the menu
Dial number and press ”Call”
The connection is established:

20. How to make encrypted DECT call ?
NSK 200 in Encrypted Mode:
Three ways to make a call:
Dial the number directly
Quick code buttons
Via Phone Book
Encr. mode
:41
N TELENOR
Last No Ph.book
Encrypted speech
Client Name
Connecting DECT
End
NATO RESTRICTED
1:47
Client Name
Choice End
Encr. mode
:41
DECT Name
Last No Ph.book
Select DECT on the Quick Menu
”R”-buttton
Via Phone Book, select person:
Select number, press ”Call”:
A voice is announcing security level of the call twice, than
the connection is established: