To enable an application access to ISDN channels, several switch connections must be made. In the board keyword file, if Clocking.HBus.ClockMode is set to StandAlone, these settings are automatically made when the board boots.
If Clocking.HBus.ClockMode is set to any other value, the application must set these values using the NMS Switching service or swish utility. The application must make the following connections:
On each trunk, streams and timeslots carrying D channel information to and from the HDLC controller (if any) must be connected to streams and timeslots accessible by the ISDN protocol stack. These connections must be full duplex. They must be made before the ISDN protocol stack is initialized. (Initialization is described in Initializing ISDN protocol stack instances.)
The streams and timeslots carrying voice information to and from the trunk must be connected to the streams and timeslots carrying voice information to and from the DSP resources. The connections must be full duplex.
The connections differ depending upon whether the NetworkInterface.T1E1.SignalingType keyword is set to PRI or RAW. Specifically, if NetworkInterface.T1E1.SignalingType=RAW, no connections are made between the HDLC controller and signaling streams. This setting is for trunks that are included in NFAS groups and do not have a D channel in operation. For more information about these keywords and about NFAS, see the NMS ISDN Installation Manual.
Connections are listed in MVIP-95 nomenclature unless otherwise specified.
Note: On CG boards, the framer signaling is hard wired to the HDLCs. Any attempt to switch framer signaling to the HDLCs will fail.
The following table shows the default connections. The exact settings depend upon the NetworkInterface.T1E1.SignalingType keyword setting. The connections are full duplex.
Board | Setting | Default connections |
Four-trunk T1 board |
PRI | Trunk 1: 0:0..22 => 65:0..22 64:0..22 => 1:0..22 Trunk 2: 4:0..22 => 65:24..46 64:24..46 => 5:0..22 Trunk 3: 8:0..22 => 65:48..70 64:48..70 => 9:0..22 Trunk 4: 12:0..22 => 65:72..94 64:72..94 => 13:0..22 |
Four trunk T1 board |
RAW | Trunk 1: 0:0..23 => 65:0..23 64:0..23 => 1:0..23 Trunk 2: 4:0..23 => 65:24..47 64:24..47 => 5:0..23 Trunk 3: 8:0..23 => 65:48..71 64:48..71 => 9:0..23 Trunk 4: 12:0..23 => 65:72..95 64:72..95 => 13:0..23 |
Four trunk E1 board |
PRI | Trunk 1: 0:0..29 => 65:0..29 64:0..29 => 1:0..29 Trunk 2: 4:0..29 => 65:30..59 64:30..59 => 5:0..29 Trunk 3: 8:0..29 => 65:60..89 64:60..89 => 9:0..29 Trunk 4: 12:0..29 => 65:90..119 64:90..119 => 13:0..29 |
Four trunk E1 board |
RAW | Trunk 1: 0:0..30 => 65:0..30 64:0..30 => 1:0..30 Trunk 2: 4:0..30 => 65:31...61 64:31..61 => 5:0..30 Trunk 3: 8:0..30 => 65:62..92 64:62..92 => 9:0..30 Trunk 4: 12:0..30 => 65:93..123 64:93..123 => 13:0..30 |