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Chapter 3: Installation
61202.086L1-1 ISU 512 User Manual 11
Where #R changes the Channel Rate (number of ISDN B channels) as follows:
0 = (2x56k and 2x64k) 2 x Clear Channel Protocol
1 = 1 B Channel (1x56k, 1x64k) BONDING Mode 1
2 = 2 B Channels (2x56k, 2x64k) BONDING Mode 1
3 = 3 B Channels (3x56k, 3x64k) BONDING Mode 1
4 = 4 B Channels (4x56k, 4x64k) BONDING Mode 1
5 = 5 B Channels (5x56k, 5x64k) BONDING Mode 1
6 = 6 B Channels (6x56k, 6x64k) BONDING Mode 1
7 = 7 B Channels (7x56k, 7x64k) BONDING Mode 1
8 = 8 B Channels (8x56k, 8x64k) BONDING Mode 1
The following are dialing examples:
Two-port call using 64k call type (2x64) 7082906055#4#0
Two-port call using 56k call type (2x56k) 7082906055#3#0
BONDING 384k using 64k call type (6x64k) 7082906055#4#6
BONDING 336k using 56k call type (6x56k) 7082906055#3#6
BONDING 256k using 64k call type (4x64k) 7082906055#4#4
If no suffix is used, the call is placed using the values configured for the ISU
512. For example, if the ISU 512 is configured for 384K, the dial string
7082906055 is the same as 7082906055#4#6.
If the Channel Rate suffix is used, the Call Type suffix is required. However,
the Channel Rate is not required to make changes to the Call Type. For exam-
ple, if the ISU 512 is configured for 384K Call Type, only the #3 suffix is re-
quired to change the Call Type to 336K. The dial string 7082906055#3 is the
same as 7082906055#3#6.
When placing non-bonded two channel calls, the originating end must use
both the Call Type and Channel Rate suffixes; otherwise, the ISU 512 attempts
to negotiate BONDING before using 2 x Clear Channel protocol. This works
for Ascend and ADTRAN; Promptus hangs the call up. Using the Channel
Rate suffix #0 causes the ISU 512 to omit BONDING negotiation and use only
2 x Clear Channel protocol; this succeeds with all vendors.