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SIP User's Manual 38 Document #: LTRT-65408

3.2.4 Cabling the MP-124

Cable your MP-124 according to each section of Table 3-4. For detailed information on the

MP-124 rear panel connectors, refer to Section 2.2.2 on page 28.

Table 3-4: MP-124 Cables and Cabling Procedure

Cable Cabling Procedure

Protective

earthing strap

Connect an earthed strap to the chassis protective earthing screw (6-32 UNC screw) and

fasten it securely according to the safety standards.

RJ-45 Ethernet

cable

Connect the Ethernet connection on the MP-124 directly to the network using a crossover

RJ-45 Ethernet cable. For connector pinouts refer to Figure 3-11 below.

Note that when assigning an IP address to the MP-124 using HTTP (under Step 1 in

Section 4.2.1), you may be required to disconnect this cable and re-cable it differently.

50-pin Telco

cable (MP-124

devices only).

An Octopus

cable is not

included with the

MP-124 package.

Refer to the MP-124 Safety Notice below.

 Wire the 50-pin Telco connectors according to the pinouts in Figure 3-12 on page 38,

and Figure 3-13 on page 39.

 Attach each pair of wires from a 25-pair Octopus cable to its corresponding socket on

the MDF Adaptor Block’s rear.

 Connect the wire-pairs at the other end of the cable to a male 50-pin Telco connector.

 Insert and fasten this connector to the female 50-pin Telco connector on the MP-124

rear panel (labeled Analog FXS Lines 1-24).

 Connect the telephone lines from the Adaptor Block to a fax machine, modem, or

telephones by inserting each RJ-11 connector on the 2-wire line cords of the POTS

phones into the RJ-11 sockets on the front of an MDF Adaptor Block as shown in Figure

3-13 on page 39.

RS-232 serial

cable

For detailed information on connecting the MP-124 RS-232 port to your PC, refer to Section

3.2.4.1 on page 40.

AC Power cable

Connect the MP-124 power socket to the mains.

MP-124 Safety Notice

To protect against electrical shock and fire, use a 26 AWG min wire to connect

analog FXS lines to the 50-pin Telco connector.

Figure 3-11: RJ-45 Ethernet Connector Pinouts

1 2 3 4 5 6 7 8

RJ-45 Connector and Pinout

4, 5, 7, 8

not

connected

1 - Tx+

2 - Tx-

3 - Rx+

6 - Rx-

Figure 3-12: 50-pin Telco Connector (MP-124/FXS only)

125

Pin Numbers