Multi-Tech Systems CF220 ユーザーズマニュアル

Chapter 1: Product Description and Specifications 

Multi-Tech Systems, Inc. 

CF220 CallFinder User Guide 

6 

To operate the CallFinder system, you will need two DID (Direct Inward Dial) lines in your office.  You 
must order the DID line from your local telephone operating company (telco).  A DID line allows one 
phone line to be associated with multiple directory numbers.  However, only one call can occur on this line 
at any given time.   

DID lines are sold in groups.  For example, a telco in New York City might offer a DID line with a set of 20 
directory numbers in the range of 212-555-4101 through 212-555-4120. 

When ordering your DID line(s), ask the telco representative for these details about the DID service.  
These details will be important when setting up your CF220 DID Adapter. 

 

Number of digits used  
to designate the DID extension  
(usually 3, 4, 6, or 7) 

 

Type of “DID Start” used 
(wink, immediate, or delay dial) 

 

 

You will need this information to configure your CallFinder DID Adapter (see Chapter 3: CallFinder Server 
Installation).     

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Use this product only with UL- and CUL-listed computers (US).  

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Caution: this unit has two power adaptors.  To disconnect power from the unit, both power cords must 
be removed to avoid electrical shock. 

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Never install phone wiring during a lightning storm. 

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Never install a phone jack in a wet location unless the jack is specifically designed for wet locations. 

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Never touch uninsulated phone wires or terminals unless the phone line has been disconnected at 
the network interface. 

• 

Use caution when installing or modifying phone lines. 

• 

Avoid using a phone during an electrical storm; there is a risk of electrical shock from lightning. 

• 

Do not use a phone in the vicinity of a gas leak. 

•    To reduce the risk of fire, use only 26 AWG or larger telephone line cord.