Polycom DOC2238A manual MPI box front panel

MGC+ Hardware and Installation Manual

Each 160-pin connector can be connected to one 160-pin connector located on the front panel of the MPI box.

160-pin connector

Converts data from four ports

PORTS A	A	PORTS
1-4		9-12
PORTS B	B	PORTS
5-8		13-16

160-pin connector

Converts data from four ports

Figure 4-15: MPI box front panel

Each of the 160-pin connectors on the MPI box interfaces to four serial ports found on the back of the MPI box. Therefore, each MPI-4/8 Network Interface module can be connected to up to eight ports. Each port has two connectors: 37-pin connector and the 25-pin connector. The 25-pin connector is used to dial to an endpoint over an ISDN switch. (In leased line connection this port is not used.) The 37-pin connector connects to the serial cable coming from the DCE.

Single port	RS-336 25 pin	RS-449 37 pin
	D-type	D-type
connection	connector	connector

DIAL	P12	DIAL	P7	DIAL	P1
DIAL	P13	DIAL	P8	DIAL	P2
DIAL	P14	DIAL	P9	DIAL	P3
P1	P6	P11
P2	P7	P12
P3	P8	P13		DIAL	P4
		P14
P4
	P9	P15
P5	P10	P16
DIAL	P15	DIAL	P10	DIAL	P5
DIAL	P16	DIAL	P11	DIAL	P6

Figure 4-16: MPI box rear panel

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