100Testing ISDN BRI functions
Packet data transmission
A packet data call can be established between two data terminals over a B-channel or a D-channel.
B-channel packet data terminals communicate with the packet handler at 64 kbps over dedicated B-channels. The packet handler may be an external packet handler, the DPN-100, or the integrated MPH. The packet handlers processes and distributes the data to local terminals for local calls or over the packet data network for remote calls.
D-channel packet data terminals communicate at a baud rate of up to 9.6 kbps. The packet data is multiplexed onto a 64 kbps BD that is linked with the external packet handler through a dedicated ISDN PRI B-channel, or, in the case of the MPH, through a dedicated connection.
Note: To perform packet data transmission verification, the system must be connected to a DPN-100, or configured with MPH. Also, packet data transmission functions must be selected when configuring the B-channel and D-channel transmission characteristics. Use LD 27 to specify the packet data transmission functions. See "MISP configuration procedures" in ISDN Basic Rate Interface Feature Fundamentals (NN43001-580).
In addition to configuring the MISP and the DSL in LD 27, ensure the following:
•the ISDN PRI loop carrying packet data was configured in LD 17
•the packet handler route was specified in LD 16
•an ISDN PRI channel for the packet handler route was configured using LD 14
See ISDN Basic Rate Interface Feature Fundamentals (NN43001-580) for a detailed description of how to configure relevant ISDN BRI packet data transmission parameters in LD 17, LD 16, and LD 14.
Procedure 37
Perform a B-channel packet data transmission test using an external packet handler
Step Action
1From an ISDN BRI B-channel packet data terminal, dial another local or a remote ISDN BRI packet data terminal and establish an active call connection.
After the call-originating ISDN BRI terminal receives an
Nortel Communication Server 1000
ISDN Basic Rate Interface Installation and Commissioning
NN43001-318 01.02 Standard
Release 5.0 20 June 2007
