NTAK10 2.0 Mb DTI card Page 715 of 894

If a coaxial interface is required, use NT5K85 in conjunction with the NTBK05.

Table 230

2 MB DTI switch options

 

Off

On

Switch

(Switch Open)

(Switch Closed)

 

 

 

S1-1

—

—

 

 

 

S1-2

CC Enabled

CC Disabled

 

 

 

S2-1

120 ohms

75 ohms

 

 

 

S2-2

75 ohms

120 ohms

 

 

 

S3-1

non-French Firmware

French Firmware

 

 

 

S3-2

—

—

 

 

 

Channel associated signaling

Channel associated signaling means that each traffic carrying channel has its own signaling channel permanently associated with it. Timeslot 16 is used to transmit two types of signaling: supervisory and address.

Incoming signal

Functions of the NTAK10 with regard to incoming signaling include:

•recognizing valid changes

•determining which channels made the changes

•collecting PPM

•reporting changes to software

Outgoing supervisory signals

The desired ABCD bit pattern for a channel is output by the NTAK10, under the control of the system controller card. The bit pattern to be transmitted is held on the line for a minimum period of time. This time is specified in the same message and ensures that the signal is detected correctly at the far end.

Circuit Card Description and Installation

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Nortel Networks 553-3001-211 manual Channel associated signaling, Incoming signal, Outgoing supervisory signals
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