Transition Networks E-TEL-1200 CABLE SPECIFICATIONS continued, Copper Cable, Category

CABLE SPECIFICATIONS (continued)

COPPER CABLE

Each RJ-45 connector requires 2 pairs of Category 5 rated cable.

The 50-pin Telco connector requires 24 pairs of Category 5 rated cable.

Either shielded twisted-pair (STP) or unshielded twisted-pair (UTP) can be used. DO NOT USE FLAT OR SILVER SATIN WIRE.

CATEGORY 5:

Gauge	24 to 22 AWG
Attenuation	22.0 dB /100m @ 100 MHz
Maximum Cable Distance:	Telco	75 meters
	RJ-45	100 meters

TELCO CONNECTOR

1	25
26	50

TELCO SIGNALS

Media Converter Port in Full-Duplex Network

In a full-duplex network, maximum cable lengths are determined by the cables used. See page 10 for cable specifications.

NOTE: The 512-Bit Rule described below does NOT apply in a full-duplex network.

Media Converter Port in Half-Duplex Network

The 512-Bit Rule applies separately to each collision domain.

USING THE 512-BIT RULE

In a half-duplex network, maximum cable lengths are determined by the round trip delay limitations of each Fast Ethernet™ collision domain. (Switches and routers divide the network into separate Ethernet™ collision domains.) The 512-Bit Rule determines maximum distances by calculating the collision domain round-trip delay in bit-times.

To calculate a collision domain round-trip delay in bit-times, find the longest path between any two

Class I repeater	140	BT	terminal devices in the collision
Class II repeater	92	BT	domain. Calculate the round
Class I TX/FX media converter	130	BT	trip delay by multiplying the
Class II TX/FX media converter	92	BT	length of the cable (in meters)
DTE (PC, switch, router)	50	BT
			by the delay per meter (in bit-
E-TX-FX-xx00 port	15	BT

Pin # Signal

1Port 1 Transmit -

2Port 1 Receive -

3Port 2 Transmit -

4Port 2 Receive -

5Port 3 Transmit -

6Port 3 Receive -

7Port 4 Transmit -

8Port 4 Receive -

9Port 5 Transmit -

10Port 5 Receive -

11Port 6 Transmit -

12Port 6 Receive -

13Port 7 Transmit -

14Port 7 Receive -

15Port 8 Transmit -

16Port 8 Receive -

17Port 9 Transmit -

18Port 9 Receive -

19Port 10 Transmit -

20Port 10 Receive -

21Port 11 Transmit -

22Port 11 Receive -

23Port 12 Transmit -

24Port 12 Receive -

25N.C.

Pin # Signal

26Port 1 Transmit +

27Port 1 Receive +

28Port 2 Transmit +

29Port 2 Receive +

30Port 3 Transmit +

31Port 3 Receive +

32Port 4 Transmit +

33Port 4 Receive +

34Port 5 Transmit +

35Port 5 Receive +

36Port 6 Transmit +

37Port 6 Receive +

38Port 7 Transmit +

39Port 7 Receive +

40Port 8 Transmit +

41Port 8 Receive +

42Port 9 Transmit +

43Port 9 Receive +

44Port 10 Transmit +

45Port 10 Receive +

46Port 11 Transmit +

47Port 11 Receive +

48Port 12 Transmit +

49Port 12 Receive +

50N.C.

1 meter CAT.5 TP cable

1.11 BT

times (BT)), then take the sum of

1 meter fiber cable

1 BT

all cable delays plus station

Fast Ethernet switch

50 BT

(DTE), repeater, and multi-port

media converter port delays. If

the result is less than or equal to 512 bit-times, the path is good.

200 meters fiber

Half-Duplex Collision Domain

50.00BT

@ 1.0 BT/meter

+11.10BT

= 200BT

+140.00BT

DTE= 50BT

150 meters fiber

+150.00BT

@ 1.0 BT/meter

+15.00BT

= 150BT

+11.10BT

10 meters TP

Class II

+50.00BT

Hub

10 meters TP

Class I

__________

@ 1.11BT/meter

= 92BT

@ 1.11BT/meter

Hub

_

= 11.1BT

= 11.1BT

= 140BT

= 437.20BT

50.00BT

+11.10BT

E-TX-FX-xx

10 meters TP

DTE= 50BT

+92.00BT

@ 1.11BT/meter

+200.00BT

Port

= 11.1BT

+15.00BT

= 15BT

+11.10BT

+50.00BT

E-TX-FX-xx

DTE= 50BT

__________

Port

_

= 15BT

= 439.20BT

10 meters TP

Half-Duplex Collision Domain

E-TX-FX-xx

@ 1.11BT/meter

= 11.1BT

Port

NOTE: Media converter

= 15BT

Switch/

Router

port is 15 bit-times IN

= 50BT

and 15 bit-times OUT =

Full-Duplex - NO Collision

Domain

30 bit-times round-trip.