ZyXEL Communications VES-1000 Series, Руководство пользователя, Страница: 29 / 227

VES-1000 Series Ethernet Switch
Hardware Connections 2-3
2.4.1 Console Port
For the initial configuration, you need to use terminal emulator software on a computer and connect it to the
console port on the VES-1000 Series switch. Connect the male 9-pin end of the console cable to the console port of
the VES-1000 Series switch. Connect the other end (either a female 25-pin or female 9-pin) to a serial port (COM1,
COM2 or other COM port) of your computer. You can use an extension RS-232 cable if the enclosed one is too
short. After the initial setup, you can modify the configuration remotely through a telnet connection.
2.4.2 VDSL Port Connections
The VES-1008A has a combined USER/CO Telco-50 connector and this is used for external POTS/ISDN and
VDSL connections (Appendix B - Diagram 2 shows the pin assignments for the combined Telco-50 connector).
Supplied with the VES-1008A is a cable that is designed to fit into the combined USER/CO socket and it is a
requirement for the installer to configure the other end of the cable to suit their installation requirements.
The Phone Port pins (pins 1-8 and 26-33) connect to the Main Distribution Frame (MDF) that is usually located in
the multi-tenant unit. Eight separate phone connections from different subscribers are available to be used on the
VES-1008A and each of their phone connections are required to be connected to their respective port on the MDF.
The VDSL Port pins are used to connect the VES-1008A to the VDSL modems (for example, ZyXEL’s Prestige
841). As with the phone port pins, each VDSL port requires 2 separate pins. Eight separate VDSL ports are
available on the VES-1008A and each port is available to a separate subscriber or user.
Diagram 2 details the pin assignments for the VES-1008A Phone and VDSL ports.
For the VES-1012 only, connect the lines from the user equipment (VDSL modems) to the
USER
port and the
lines from the central office switch or PBX (Private Branch Exchange) to the
CO
port. Make sure that the
USER
line and the
CO
lines are not shorted on the MDF (Main Distribution Frame).
The line from the user carries both the VDSL and the voice signals. For each line, switches in the VES-1000 Series
have a built-in splitter that separates the high frequency VDSL signal from the voice band signal and feeds the
VDSL signal to the VES-1000 Series switch, while the voice band signal is diverted to the CO port.
2.4.3 10/100M Auto-Sensing Ethernet
VES-1000 Series switches have 10/100Mbps auto-sensing Ethernet ports. There are two factors related to Ethernet:
speed and duplex mode. In 10/100Mbps Fast Ethernet, the speed can be 10Mbps or 100Mbps and the duplex mode
can be half duplex or full duplex. The auto-negotiation capability makes one Ethernet port able to negotiate with a
peer automatically to obtain the connection speed and duplex mode that both ends support.
When auto-negotiation is turned on, an Ethernet port on the VES-1000 Series switch negotiates with the peer
automatically to determine the connection speed and duplex mode. If the peer Ethernet port does not support auto-
negotiation or turns off this feature, the VES-1000 Series switch determines the connection speed by detecting the
signal on the cable and using half duplex mode. When the VES-1000 Series switch’s auto-negotiation is turned off,
an Ethernet port uses the pre-configured speed and duplex mode when making a connection, thus requiring you to
make sure that the settings of the peer Ethernet port are the same in order to connect.