# CT1 and CE1 I/O Modules

CT1 I/O modules have 24 RJ-48C female connectors. CE1 I/O modules have either 20 RJ-48C female connectors or two 25-pair female Telco connectors. Figure 56 shows the location of the ports on a CT1 I/O module and the sequence of the pins in the RJ-48C connector. CE1 I/O modules equipped with RJ-48C connectors have the same configuration as CT1 I/O modules equipped with RJ-48C connectors.

Figure 56: CT1 I/O Module Ports

Table 22 lists the pinout for the CT1/CE1 connector.

Table 22: CT1/CE1 I/O Module—RJ-48C Connector Pinout

Pin | Signal
--- | ---
1 | RX Ring
2 | RX Tip
3 | no connect
4 | TX Ring
5 | TX Tip
6 | no connect
7 | no connect
8 | no connect

For CE1 I/O modules with Telco connectors, the other ends of the cables are attached to a balun panel that splits the signals from two Telco connectors to 20 pairs of BNC connectors. We supply the Telco cables if you purchase a balun panel. Figure 57 shows the location of the Telco connectors on a CE1 I/O module and the sequence of the pins in the connectors.

Figure 57: CE1 I/O Module with Telco Connectors

Figure 58 shows the location of the 20 pairs of BNC connectors on a balun panel. The cables from the CE1 I/O module are plugged into the two 50-pin Telco connectors on the other side of the panel.

Figure 58: Twenty-Port Balun Panel

Table 23 and Table 24 list the pinouts for the Telco connectors on each cable.

Table 23: Pinout of 50-Pin Telco Connector to Ports 0–9

Pin | Signal | Pin | Signal
--- | --- | --- | ---
1 | Port 0 RX TIP | 26 | Port 0 RX RING
2 | Port 0 TX TIP | 27 | Port 0 TX RING
3 | Port 1 RX TIP | 28 | Port 1 RX RING
4 | Port 1 TX TIP | 29 | Port 1 TX RING
5 | Port 2 RX TIP | 30 | Port 2 RX RING
6 | Port 2 TX TIP | 31 | Port 2 TX RING
7 | Port 3 RX TIP | 32 | Port 3 RX RING
8 | Port 3 TX TIP | 33 | Port 3 TX RING
9 | Port 4 RX TIP | 34 | Port 4 RX RING
10 | Port 4 TX TIP | 35 | Port 4 TX RING
11 | Port 5 RX TIP | 36 | Port 5 RX RING
12 | Port 5 TX TIP | 37 | Port 5 TX RING
13 | Port 6 RX TIP | 38 | Port 6 RX RING
14 | Port 6 TX TIP | 39 | Port 6 TX RING
15 | Port 7 RX TIP | 40 | Port 7 RX RING
16 | Port 7 TX TIP | 41 | Port 7 TX RING
17 | Port 8 RX TIP | 42 | Port 8 RX RING
18 | Port 8 TX TIP | 43 | Port 8 TX RING
19 | Port 9 RX TIP | 44 | Port 9 RX RING
20 | Port 9 TX TIP | 45 | Port 9 TX RING
21 | no connect | 46 | no connect
22 | no connect | 47 | no connect
23 | no connect | 48 | no connect
24 | no connect | 49 | no connect
25 | no connect | 50 | no connect

Table 24: Pinout of 50-Pin Telco Connector to Ports 10–19

Pin | Signal | Pin | Signal
--- | --- | --- | ---
1 | Port 10 RX TIP | 26 | Port 10 RX RING
2 | Port 10 TX TIP | 27 | Port 10 TX RING
3 | Port 11 RX TIP | 28 | Port 11 RX RING
4 | Port 11 TX TIP | 29 | Port 11 TX RING
5 | Port 12 RX TIP | 30 | Port 12 RX RING
6 | Port 12 TX TIP | 31 | Port 12 TX RING
7 | Port 13 RX TIP | 32 | Port 13 RX RING
8 | Port 13 TX TIP | 33 | Port 13 TX RING
9 | Port 14 RX TIP | 34 | Port 14 RX RING
10 | Port 14 TX TIP | 35 | Port 14 TX RING
11 | Port 15 RX TIP | 36 | Port 15 RX RING
12 | Port 15 TX TIP | 37 | Port 15 TX RING
13 | Port 16 RX TIP | 38 | Port 16 RX RING
14 | Port 16 TX TIP | 39 | Port 16 TX RING
15 | Port 17 RX TIP | 40 | Port 17 RX RING
16 | Port 17 TX TIP | 41 | Port 17 TX RING
17 | Port 18 RX TIP | 42 | Port 18 RX RING
18 | Port 18 TX TIP | 43 | Port 18 TX RING
19 | Port 19 RX TIP | 44 | Port 19 RX RING
20 | Port 19 TX TIP | 45 | Port 19 TX RING
21 | no connect | 46 | no connect
22 | no connect | 47 | no connect
23 | no connect | 48 | no connect
24 | no connect | 49 | no connect
25 | no connect | 50 | no connect