Operating instructions
14 
Issue 1.0 March, 2006 
Hybrid Phone 
Use your current telephone equipment, such as Modems, cordless telephones, Answering machines, etc. Just 
plug this equipment into the Analog port of the key telephone and the call can be automatically transferred to the 
equipment when you are busy or do not answer. No extra wiring and programming. This feature provides easy 
installation and programming-free transfer of calls from the key telephone to Analog Single Line equipment. 
Full ISDN features 
The TDS 600 system allows you to access different outside line types (PSTN & ISDN BRI, PRI, T1, E1, …) in 
one box and enjoy Full ISDN Features when accessing an ISDN Line - such as: 
.  Call Charge Metering Information 
.  Caller Identification 
.  Direct Inward Dialing 
.  Call Forward Internal / External 
.  Call Waiting 
.  MSN (Multiple Subscriber Number) 
.  Sub-addressing 
.  User to User Signaling 
You can easily control your budget by using different outside line arrangements. 
Liquid Crystal Display 
The DK1 Series Telephone Model DK-1D is equipped with a large, easy to read LCD display. The LCD is 32 
characters total, comprised of 2 rows by 16 characters each. 
The DK2 Series Telephone Model DK2-21 is equipped with a large, easy to read LCD display. The LCD is 64 
characters total, comprised of 4 rows by 16 characters each 
This LCD provides an invaluable tool for simplifying the use of the telephone by identifying the calling extension 
by name, outside lines by name and self prompting displays for feature access. Station feature usage is made 
simple with the help of the LCD display. Continuous prompting information is displayed during calls so that users 
know what to do and when to do it. 
32-character LCD Display shows: 
•  Time  •  Last number dialed 
•  Dialed telephone number  •  The status of operation/function 
•  Voice Mail Messages  •  Absent messages 
•  CO Line Names  •  Speed Dial Directory 
•  Last Number Redial  •  Calling Party Number and Name 
•  Speed dial number  •  Input data during system data entry 










