
74 Configuring Enterprise Edge Resources
Enterprise Edge 2.0 Programming Operations Guide P0911588 Issue 01
Disconnect timer
Disconnect timer (North America only) lets you specify the duration of an Open
Switch Interval (OSI) before a call on a supervised external line is considered
disconnected. This setting must match the setting for the line at the central office
(CO).
You must enable disconnect supervision by changing the Trunk mode attribute.
Under the Telephony Services sub-heading, choose Lines and Line/trunk Data. See
Trunk/line data on page 111 for more information.
Protocol
Enterprise Edge supports a number of different trunk protocols used by different
service providers and markets. Supported protocols are listed in the table below.
Protocol type
When you select SL-1 protocol, an additional setting, Protocol type, appears.
Because SL-1 protocol is a private networking protocol, you have the option of
designating an Enterprise Edge node as a Network (Master). The default setting is
User (Slave). In public network configurations, the CO is generally considered the
Network side or Master.
NSF Extension
If you select the NI-2 protocol and you are using Call-by-Call services, you must
specify how Enterprise Edge should handle the NSF (Network Specific Facilities)
The table below summarizes the NSF Extension settings recommended for each
switch type.
ISDN Service Protocol
PRI-T1 NI-2, DMS100, DMS250, AT&T4ESS, SL-1
PRI-E1 QSIG, Euro, Sl-1
BRI (North America) NI
BRI (Europe) Euro, QSIG
Protocol Type
NI-2, DMS100, DMS250, AT&T4ESS Public protocols
SL-1 (premium feature) Private protocol
Central Office NSF Extension Setting
DMS100 None
Siemens ESWD, Lucent 5ESS WATS
GTD5, DMS10 ALL
The Network Specific Facilities (NSF) information element is used to request a
particular service from the network.
When you select NONE, the NSF extension bit is not set for any service.
When you select WATS, the NSF extension bit is set for unbanded OUTWATS calls.
When you select ALL, the NSF extension is always set for all CbC services.
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