AT&T Release 2.0 Bit-Error Rate Threshold Option, Switch Settings for Framing in Hybrid/PBX Mode

Connecting the Control Unit to the Network Interface

Bit-Error Rate Threshold Option

DIP switch SW2 can be set to alarm at bit-error rate (BER) threshold levels between 10-4 and 10-9 or can be disabled. Table 4-9 shows the settings for SW2 for the various thresholds.

Table 4-9. SW2 BER Options

Position			Threshold		Option
	10-4	10-5	10-6	10-7		10-8	10-9	Disable
1	up	down	up	down		up	down	down
2	up	up	down	down		up	up	up
3	up	up	up	up		down	down	up
4	up	up	up	up		u p	up	down

5

6

7

8

not used (up)

not used (up)

not used (up)

u p = non-latching mode; down = latching mode

Switch Settings for Framing in Hybrid/PBX Mode

The framing format for the network and for data terminal equipment can be either D4 or extended superframe (ESF). DIP switches SW5 and SW6 must be set according to the following tables to match the framing format for the network and the equipment. This applies to Hybrid/PBX mode only.

4-22Installing the Channel Service Unit