Polycom 4300T Benutzerhandbuch

User Guide V

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IU 4300T Converged Network Appliance

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Display and set the clock timing source for the T1/E1 interface.  The timing can 

be either derived from the network (External) or provided to the T1 interface 

by the V

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IU (Internal).  With a carrier-provided T1, the timing is usually 

derived from the network (External, the default setting).

Display and set the loopback setting.  During T1 line testing the local interface 

can be set to Loopback to allow the network provider to verify connectivity 

and line quality.  For normal operation the setting should always be No 

Loopback (the default setting).

The 4300T can act as a DHCP server granting IP addresses to PCs, 

workstations, servers or voice devices (IP phones, IADs or softphones) 

connected to its LAN interfaces.  DHCP is a protocol that enables IP devices to 

obtain temporary or permanent IP addresses (out of a pool) from centrally 

administered servers.  
The user can configure blocks of IP addresses, a default gateway, DNS servers, 

NTP server address, Time offset from NTP value, WINS address and 

TFTP/FTP server name that can be served to the requesting IP devices.  

Mismatched timing modes can result in WAN connectivity but with intermittent data 
loss.