External DIP Switches

Configuring the ICX-250

33

T1 Interface - T1 Clock (DIP switch - back)

ICX-250 - Rear Panel

Switch numbers S1 through S5 are shown on the board within the unit.

 

 

 

 

 

 

 

 

 

 

 

 

 

Data 1

 

 

 

 

 

 

 

 

T1

 

 

 

FXS Loop Pairs

FXS Loopback

 

 

 

 

 

 

 

 

T1 Line

Rx

24/48 VDC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

12 13

24

Alm.

Data 1

Data 2

Data 2

 

T1

 

 

Tx

 

+ – G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VAC–.6A 60Hz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11268-A

 

 

 

 

S5

S4

S3

 

S2

 

S1

 

 

 

 

T1

ONDIP

1 2 3 4 5 6 7

LINE

T1

ONDIP

1 2 3 4 5 6 7

INTERNAL

Description: S1 position 4 is used to select the T1 clock source.

Factory Setting: LINE

Line: Clock for the T1 interface will be recovered from the line (receive signal).

Internal: Clock for the T1 interface will be taken from an on-board 1.544 MHz clock meeting the Stratum 4 requirements.

Note: Failure of external clock causes unit to switch to internal clock. When external clock is restored, the unit will switch back to external clock source.

Issue 1, September 1998

ADCP-62-023

© 1998, ADC Telecommunications, Inc.