OmniConnect / ISDN
User’s Manual
Page 19
Part number 613-10787-00
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Circuit Switched Voice Channel (CSV CHL)
This parameter sets which bearer channel should be used for the voice call. This parameter
should be set to ANY to allow either B channel to be used.
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Circuit Switched Voice Additional Call Offering (CSV ACO)
This parameter allows incoming voice calls when the bearer channel is busy with a data call.
This feature provides notification to the ISDN CPE equipment that a call directed to the CPE
is present at the switch, even though the bearer channel may be busy. This parameter should
be set to U or Unrestricted.
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Circuit Switched Voice Limit (CSV Limit)
This parameter sets the limit of the number of voice calls that may be received at any given
instance. It should be set to two to allow two voice calls simultaneously.
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Directory Number (DN)
The local phone number(s) associated with the B1 and B2 channels. Typically two DNs are
assigned.
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Electronic Key Telephone System (EKTS)
This parameter is used to tell the switch that the CPE equipment is a key system. This
parameter should be set to
no
.
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Terminal Type (TERMTYP)
AT&T has defined terminal types by letters. Terminal Type A is a basic ISDN terminal.
TERMTYP should be set to A.
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Service Profile Identifier (SPID)
A SPID is a number that identifies ISDN equipment attached to an ISDN line. In North
America, ISDN lines are typically provisioned with zero, one or two SPIDs.
3.6.
SPIDs
A Service Profile Identifier (SPID) is a number that identifies ISDN equipment attached to an
ISDN line. SPIDs are in common use only in North America. In North America, ISDN lines
are provisioned, depending upon the ISDN switch type, with one, two, or zero SPIDs. For
AT&T 5ESS custom switches, no SPID is assigned if the ISDN provider is using a Point-to-
Point switch and one SPID is assigned for the Multipoint switch. For Northern Telecom
DMS-100, NI-1 and all NI-1 compliant switches, two SPIDs are usually assigned. All other
switch types do not use SPIDs. When ISDN service is ordered, the ISDN provider assigns the
necessary SPID or SPIDs, which are then used when configuring the OmniConnect/ISDN.
Note:
Normally, it is not necessary to understand the details regarding SPIDs; the
numbers provided by the ISDN provider are simply entered when configuring the
OmniConnect. If, however, the ISDN provider does not provide the necessary SPIDs
or provides SPIDs that are incorrect, the information in the following sections will
aid in providing an explanation to the ISDN provider regarding the SPID
requirements.
An SPID is normally derived from a telephone number for the ISDN BRI line. It may or may
not include the area code, and it may have a special prefix and/or suffix. The SPID formats
used for NI-1, NI-2, AT&T 5ESS and Northern Telecom DMS-100 switches are described in
the following sections.
