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ISDN I.430 and I.431 Switch Variants
To use the Native I.430 mode that is supported in Japan and is known as D64S in
Germany, you must code the ISDN switch variant as I.430. This treats the ISDN
interface like a leased line. There is no D-channel signalling traffic in this mode.
Code the switch variant as I.431 when running a leased line over ISDN PRI (T1/J1
only).
Native I.430 Support
Only one dial circuit is allowed per I.430 base net. You can configure the speed to
either 64-Kbps, 80-Kbps, 128-Kbps, or 144-Kbps using the set bandwidth
command. On models 1S4, 1S8, 1U4, and 1U8, if WAN and ISDN are both active,
this is restricted to 64-Kbps only. See “Set” on page 629 to configure the bandwidth
command.
Example: Base ISDN Net
Config> n 6
ISDN Config> set switch i430
ISDN Config> list all
ISDN Configuration
Maximum frame size in bytes = 2048
Switch Variant = I430 BRI
PS1 detect = Enabled
Example: Dial Circuit
Config>n 7 ------------------ DIAL CIRCUIT (CAN ONLY BE ONE FOR I430)
Circuit config: 7>
Circuit config: 7>set net 6
Circuit config: 7>set bandwidth 128
Circuit config: 7>list all
Base net = 6
I430 BRI Bandwidth = 128 kbs
Native I.431 Support
When configuring for Native I.431 support, only one dial circuit should be used. It
should be attached to the base net. The I.431 only runs on the ISDN PRI T1
adapter. The speed is fixed at 1.5 Mbps.
Note: The multiport ISDN PRI adapters do not support the I.431 switch variant. To
utilize a full PRI line, select the channelized variant and assign all the
timeslots to one dial circuit.
Example: Base ISDN net
Config> n 5
ISDN Config> set sw i431
ISDN Config> list all
ISDN Configuration
Maximum frame size in bytes = 2048
Switch Variant = I431 PRI
Example: Dial Circuit
Using ISDN
Chapter 45. Using the ISDN Interface 625
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