ZyXEL Communications P841C User Manual

P841C Central-Side VDSL Modem 

Getting to Know the P841C 

1-1 

The P841C is a VDSL Line Termination (LT) modem that is the perfect partner for the P841 VDSL subscriber 
modem. It maps traffic from one VDSL (Very high bit rate Digital Subscriber Line) subscriber to one 10/100M 
Ethernet that connects to a computer or LAN switch. It has built-in POTS/ISDN splitters and a console port for 
local management. 

1.1 Features 

The P841C is just 18cm x 12.6cm x 3cm (Width, Depth, Height) in size. Because of built-in POTS/ISDN splitters, 
you do not have to allocate extra space for external splitters that separate voice-band and DSL signals. 

The 10/100 Mbps Fast Ethernet port allows you to connect it to a LAN switch. 

The P841C supports the following DSLAM VDSL modes.  

•  10BaseS mode giving upstream rates from 1.56 Mbps to 18.75 Mbps and downstream rates of 4.17 

Mbps Kbps to 16.67 Mbps. 

•  ANSI Mode giving upstream rates from 1.56 Mbps to 6.25 Mbps and downstream rates of 4.17 Mbps 

to 16.67 Mbps. 

•  ETSI Mode giving upstream rates from 1.56 Mbps to 6.25 Mbps and downstream rates of 4.17 Mbps 

to 12.50Mbps. 

Command-line interface 

System status (link status, rates, statistics counters) 

1.2 Application Example 

The following diagram depicts a typical application of the P841C VDSL line termination modem working 
together with the P841 VDSL subscriber modem in a campus setting.  With the built-in splitters, VDSL service 
can coexist with voice service on the same line. 

 

Chapter 1   

Getting to Know the P841C