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A .
CONNECTIVITY
The ISPBX acts as an integrated services PBX: it is possible to establish a digital 64 kbps
transparent connection between any two ports in the fully integrated network irrespective if
the parties connected to the ports are compatible. The system does not observe what is
actually transferred over the connection between the ports. It accepts data bytes from a port
and delivers this data byte to another port without processing the byte. Such a byte might for
instance be a digitised voice sample or a byte of computer data.
To prevent connections between incompatible parties, the system manager must define which
ports are allowed to be connected together. A number of tools are available for this purpose;
number analysis, traffic classes, compatibility values, facility class marks, IBSCs and BSPTs. For
more information on the use of these management tools: see Facility Implementation Manual;
Management.
A.1.
DETERMINING CONNECTIVITY
For a successful data connection it is necessary that both parties involved are compatible. A
number of checks are done by ISPBX to ensure this compatibility. This section describes a
number of important factors in determining connectivity.
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Internal Basic Service Category (IBSC).
Each DNR has an IBSC allocated to it.
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A default IBSC is allocated using NEBOUND 025. All DNRs get this IBSC unless
otherwise specified.
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The IBSC of a DNR can be changed using the OM command CHDNRS.
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Basic Service Profile Type (BSPT).
Each DNR and route has a BSPT allocated to it.
-
A default BSPT is determined using the IBSC as a reference as follows:
IBSC:
Data oriented:
Voice oriented:
Unknown:
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The BSPT of a DNR can be changed using the OM command CHDNRS.
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A route or bundle can have more than one BSPT allocated to it.
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A BSPT can be assigned to a route using the OM command ASBSPR. For each BSPT
the route characteristics can be filled in with the OM commands CHRTCG, CHRTCI
and CHRTCO,
-
A BSPT can be added assigned to a bundle using the OM command ASBSPB. For each
56
BSPT:
0, 2, 5... 13, 15... 17 94 (data/possibly data)
1, 14, 18 95 (voice/possibly voice)
3, 4, 19 98 (any)
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