HBLXT9785EHC.B2Q E000 Intel, HBLXT9785EHC.B2Q E000 Datasheet - Page 151

• Manufacturer Part Number: HBLXT9785EHC.B2Q E000
• Manufacturer: Intel

Specifications of HBLXT9785EHC.B2Q E000

• Lead Free Status / RoHS Status: Not Compliant

4.11
4.11.1
Datasheet
Document Number: 249241
Revision Number: 010
Revision Date: 30-May-2006
Figure 29. Typical IP Telephone System Connection
DTE Discovery Process
The DTE discovery process is port dependent and must be enabled through software. The process
is implemented as a next page option to the auto-negotiation flow. When the process is enabled,
manual control of auto-negotiation next pages is not allowed. This feature applies to the
LXT9785E transceiver only.
The process depends upon an IP phone, or any other DTE capable of being powered remotely,
having a specific filter that passes NLPs and FLPs. This filter should be non-polarized to insure
that the latest status of Auto-MDIX operation does not effect operation. This filter attenuates
100 Mbps MLT3 signals and 10 Mbps Manchester-encoded signals, and must be bypassed when
power is applied to the IP phone.
Definitions
The following terms are used throughout the DTE discovery sections:
Negotiation Process:
System:
Link Partner:
DTE:
Standard Link Partner:
Remote-Power DTE:
Discovery:
Power
Outlet
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
Power cable
Generator
UPS/
This includes auto-negotiation and parallel detection processes
The switch system using the LXT9785E for DTE Discovery
A device connected to the LXT9785E through twisted pair cables
Data Terminal Equipment; any end-of-link partner
A link partner that is not requiring power over a Category 5 cable;
typically a PC
Data Terminal Equipment requiring power over a Category 5 cable;
typically an IP telephone
The process of identifying the type of link partner present
Figure 29
Po we r
F a u l t
P ro Cu rve S wi t c h 24 24 M
HP J4122 B
Co n so l e
M od ul e S ta tus
Se l f T e st
VoIP-Enabled Switch
Re s e t
1 2
7 8
C l e a r
3
9 1 0 1 1 1 2
4 5
6
1 3 1 4 1 5 1 6 1 7 1 8
1 9
Mo de Sel ec t
20
Ac t
2 1
F d x
2 2 23 2 4
1 0 0
L i n k
Mo de
L i n k
Mo de
IP Telephone
1 X
7 X
shows a typical IP telephone system connection.
2 X
8 X
3 X
9 X
1 0 X
4 X
1 1 X
5 X
6 X
12 X
1
4
7
*
1 0 /1 0 0 Ba s e -T Po rt s
2 3
5 6
8 9
8 #
1 3X
1 9X
1 4 X
2 0 X
15 X
21 X
1 6 X
2 2 X
1 7 X
2 3 X
1 8 X
2 4 X
SD
Power and data over
Category 5 cable
Data only over
Category 5 cable
Computer
Power cable
Power
Outlet
151