Specifications

Dialogic

DSI SS7HD Network Interface Boards Programmer's Manual Issue 11

As an alternative to using s7_mgt, users can build their own configuration utilities

using messaged-based configuration. In this case users should refer to the definitions

of individual messages in Section 4, Message Reference on page 47.

The Code File contains the operating firmware for the board which is downloaded to

the board at run-time by the ssdh binary. The code file should be specified in the

SS7BOARD command in the config.txt file.

3.2 Board Code File

The DSI Network Interface Boards Code Files contain the operating software for the

DSI Network Interface Boards. The appropriate code file must be downloaded by the

host, to the board, at run-time.

The following code files are available for the SS7HD board:

• The ss7.dc4 code file.

Note: The ss7.dc4 code file is distributed as part of the Dialogic

DSI Development Package.

The code file requires a host license which enables the software to run on the board,

details on how to use a Host License are given in the Dialogic

Distributed Signaling

Interface Components Host Licensing User Guide.

3.3 Monitoring

The monitoring option can be used in conjunction with the SS7 Development Package

for the appropriate operating system (Linux, Solaris, or Windows

) to realize a high-

performance protocol monitor with up to 16 boards, each monitoring a certain number

of links (see the table in Section 2.5.2, “Run Modes and Protocol Dimensions” on page

29 for details).

When used in a passive monitoring mode, the DSI SS7HD board treats the signaling

timeslot as an HDLC channel so, in addition to SS7, other flag-idle HDLC-based

protocols may be monitored, for example LAPB, Q.931 (ISDN PRI) and DPNSS. The

protocol to be monitored must have a minimum frame length (excluding flags) of 5

octets, a maximum of 278 octets, and use the CRC polynomial (x16 + x12 + x5 + 1).

When operating in monitoring mode, the 3rd and successive identical frames may be

filtered.

It is possible to configure monitoring and terminated SS7 links on the same signaling

board.

For receive only operation, the board allows the T1/E1/J1 interfaces to be configured in

any of the following modes:

- Normal terminated impedance

- High impedance

When using High Impedance mode care should be taken to avoid long cable runs as

this can result in poor signal quality due to signal reflections.