Instruction manual

Total Access 850 System Manual Section 2 Engineering Guidelines

OCU DP Access Module (P/N 1180005L1)

The OCU DP module is a single port access module used to provide the interface between a DS0 time slot

on the T1 and a 4-wire DDS device at the customer premises. The OCU DP supports up to 18 kft of copper

for remote DSU connectivity. This module is currently only supported by BCU L1 and L2. Table 31 gives

this pinout.

E&M/TO Access Module (P/N 1180402L1)

The E&M/TO module is a single port Ear and Mouth/Transmit Only access module. The primary

application for this module is to provide PBX foreign exchange at the customer premises or tandem central

office applications. The E&M/TO module supports both 2- and 4- wire operation. This module is currently

only supported by BCU L1 and L2. Table 32 gives the E&M/TO module pinout.

The OCU DP Access Module may be used for intra-building networks only. This interface

should not be connected to public networks.

Table 31. OCU DP Pinout

Total Access 850 Slot T/R RX T1/R1 TX

1 26/1 27/2

2 30/5 31/6

3 34/9 35/10

4 38/13 39/14

5 42/17 43/18

6 46/21 47/22

The E&M/TO Access Module may be used for intra-building networks only. This interface

should not be connected to public networks.

Table 32. E&M/TO Pinout

Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6

1 5 9 131721RING

2 6 10 14 18 22 RING 1

3 7 11 15 19 23 SG LEAD

4 8 12 16 20 24 SB LEAD

26 30 34 38 42 46 TIP

27 31 35 39 43 47 TIP 1

28 32 36 40 44 48 E LEAD

29 33 37 41 45 49 M LEAD