DirecTV Serial Control Utility

If your receiver has a modular low speed data or home control jack like this, you need a modular 4P4C adaptor.

Modular 4P4C adaptor. Available with serial extention cable or USB to serial cable.

Adaptor with 10 foot serial cable $20.00 each + $5.00 shipping	Adaptor with 6 foot USB to serial cable $35.00 each + $5.00 shipping
Please allow 1 week for delivery.

Modular 4P4C adapter wiring
DE9F	Modular 4P4C	Wire Color
5	1	Black
2	2	Red
3	4	Yellow

If your DirecTV receiver has a 9 pin low speed data port, a common serial extention cable can be used to connect it to your PC.

Receivers with a 15 pin wide band data port require an adapter available from store.tivo.com (Page 2, "Serial Cable Adaptor).

Wide band data port adapter wiring
DE9F	DA15M
5	13
2	14
3	6

If you want a custom cable rather than using an adapter, use the information below.

Cable Wiring

Computer TiVo DirecTV Receiver

DE9F DB25F Sig 3.5 mm Sig Sig DE9M DA15M Modular 4P4C

5 7 Gnd Sleeve Gnd Gnd 5 13 1

2 3 RxD Ring RxD TxD 2 14 2

3 2 TxD Tip TxD RxD 3 6 4

Cable Wiring
Computer	TiVo	DirecTV Receiver
DE9F	DB25F	Sig	3.5 mm	Sig	Sig	DE9M	DA15M	Modular 4P4C
5	7	Gnd	Sleeve	Gnd	Gnd	5	13	1
2	3	RxD	Ring	RxD	TxD	2	14	2
3	2	TxD	Tip	TxD	RxD	3	6	4

The modular connector is the narrow variant used on telephone handset cords. Each end of a handset cord is wired opposite the other, both schemes are shown in the table above.

D subminature connector designations D[shell][pins][gender]

shell = (smallest to largest) E,A,B,C,D

pins = (typical) 9,15,25,37,50

gender = M (male) or F (female)

Designation Common use

DE9 Serial (RS-232), CGA, EGA

DE15 VGA

DA15 Game controller, Ethernet AUI

DB25 Serial (RS-232), Parallel printer, SCSI (Apple)
DC37 External floppy

Designation	Common use
DE9	Serial (RS-232), CGA, EGA
DE15	VGA
DA15	Game controller, Ethernet AUI
DB25	Serial (RS-232), Parallel printer, SCSI (Apple)
DC37	External floppy

Modular connector designations
[poles]P[conductors]C

poles = (aka positions) 4,6,8,10
conductors = 2,4,6,8,10

Designation Common use

4P4C Telephone handset, DirecTV serial port

6P2C Single telephone line

6P4C Two telephone lines

8P8C Twisted pair Ethernet, Serial (RS-232) port without CD, RI
10P10C Serial (RS-232) port

Designation	Common use
4P4C	Telephone handset, DirecTV serial port
6P2C	Single telephone line
6P4C	Two telephone lines
8P8C	Twisted pair Ethernet, Serial (RS-232) port without CD, RI
10P10C	Serial (RS-232) port

RJ series numbers are telephone service specifications, not connector designations! There is no RJ spec for a 4P4C connector.

Specification Connector Use

RJ11 6P2C Single T/R line

RJ12 6P4C Single T/R line with A/A1 lamp control

RJ14 6P4C Two independent T/R lines

RJ25 6P6C Three independent T/R lines

RJ31 8P8C Single T/R line in/out for alarm dialers

RJ45 8P8C 2 wire data line (T1, etc) with programming resistor

RJ48 8P8C Two T/R lines

RJ61 8P8C Four T/R lines

Specification	Connector	Use
RJ11	6P2C	Single T/R line
RJ12	6P4C	Single T/R line with A/A1 lamp control
RJ14	6P4C	Two independent T/R lines
RJ25	6P6C	Three independent T/R lines
RJ31	8P8C	Single T/R line in/out for alarm dialers
RJ45	8P8C	2 wire data line (T1, etc) with programming resistor
RJ48	8P8C	Two T/R lines
RJ61	8P8C	Four T/R lines