3 General Use
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Type of calls*
Auto: 384 kbps on ISDN/768 kbps on LAN
Max: 512 kbps on ISDN-BRI
2Mbps (1920 kbps, IP only)
1472 kbps = 23B, IP only
1152 kbps = 18B, IP only
768 kbps = 12B, IP only
512 kbps = 8B
384 kbps = 6B
320 kbps = 5B
256 kbps = 4B
192 kbps = 3B
128 kbps = 2B, Bonding/H.221
64 kbps = 1B, H.221
*Some software versions and networks do not support all channel selections.
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 you may have to dial both ISDN numbers separately to call those systems.
These types of calls are often referred to as H.221 calls, 2x64 calls, or 2x56 calls, as you are
making 2 x 64 kbps or 2 x 56 kbps calls to the same system. To place this type of call, set
bandwidth to 128 kbps and Network to ISDN. A field for 2nd number pops up in Call Settings.
Enter the first number in the call menu and 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
Sub-address is used to address different systems on the same ISDN line and is primarily
used in European Countries. TCS-4 is used to address different systems on a LAN, when
dialing in via a gateway.
To specify an ISDN sub-address or its LAN equivalent extension address (TCS-4), add a star
(*) after the number and then enter the sub-address/extension address.
Example:
12345678*10 ( <number>*<Sub-address/extension address/MCU password>)
When calling to external MCU’s requiring a password (TSC-1), this password can be added
after the star (*). If no password is specified, a menu will prompt you to enter the password
(after connecting to the MCU).