TANDBERG 1000 MXP 用户手册

Administrator Settings 

149 

 

 

 

Bandwidth decides the quality of the video picture.  
 
When set to Auto the system will establish a connection using a proper 
bandwidth for the call, typically 384kbps for ISDN calls and 768kbps for IP 
calls.  
 
When set to Max the system will set up the call with maximum bandwidth 
depending on the selected network.  
 
Overview*

 

Auto:        384 kbps on ISDN/768 kbps on LAN 
Max:         384 kbps on ISDN-BRI             
                768kbps (IP only) 
 
768 kbps   = 12B, IP only 
512 kbps   = 8B, IP only 
384 kbps   = 6B 
320 kbps   = 5B 
256 kbps   = 4B 
192 kbps   = 3B 
128 kbps   = 2B, Bonding/H.221 
64 kbps     = 1B, H.221 
 

* Note that some software versions and networks do not support all channel selections. 
 

 

A restricted call uses 56kbps channels rather then the default unrestricted 
64kbps channels.  
 
Some older networks (primarily in the USA) do not support 64kbps channels 
and require the use of restricted 56kbps calls. By default the system will dial 
an unrestricted call and downspeed to 56kbps if necessary.  
 
To force a restricted call, choose Restrict (56k) On.  
 

 
H.221 or 2x64 (2x56) Calling

  

Some older or low end video systems do not have the ability to make bonded ISDN calls. In these 
cases it is necessary to dial both ISDN numbers separately to call those systems.  
 
These types of calls are often referred to as  

ƒ

 H.221 

calls 

ƒ

 2x64 

calls 

ƒ

 2x56 

calls 

 
 - as making 2 x 64 kbps or 2 x 56 kbps calls to the same system.  
 
Place this type of call by: 

ƒ

  Set Network to ISDN 

ƒ

  Set Bandwidth to 128 kbps  

ƒ

  A field for the 2nd number pops up in Call Settings. 

ƒ

  Enter the second number in the Call Settings field. For 128 kbps calls that use bonding, 

ignore the second number field and just enter one number to be dialed. 

 
Using sub-address / extension address / MCU password