3com VCX V7000 Owner's Manual Page 129

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Configuring Emergency Services 129
Attendant Console
Busy Lamp Flash
Descriptions
The attendant can use the Busy Lamp Flash (BLF) lights that are next to
each extension on the attendant console to indicate the state of a user’s
telephone.
When a BLF light is off, the user’s phone is not busy (on-hook) and
available.
When a BLF light is on, the user’s phone is busy (off-hook) and in use.
Configuring
Emergency Services
An Emergency Response Location (ERL) is a location to which an
emergency team may be dispatched.
Depending on its size, a VCX system may be organized into multiple ERLs.
For example, in a multi-building campus, you could define an ERL for
each floor in each building. In this case, all the phones (uniquely
identified by an assigned IP address) on a floor would be members of a
unique ERL.
When a phone assigned to an ERL dials the configured emergency
number, a callback number is presented as the caller ID to the Emergency
Services Operator. The presented number is either the ERLs default
emergency callback phone number or an Emergency Location
Identification Number (ELIN).
A set of ELINs can be assigned to each ERL. This pool of ELINs allows
multiple phones within an ERL to dial the emergency number and be
assigned a unique callback number (an ELIN). When a caller dials the
emergency number, an ELIN is associated with the IP address of the
phone. The Emergency Services Operator can use the ELIN to call back
the emergency caller.
Normally, an ELIN remains in use (cannot be assigned to a new caller)
unless the Emergency Services Operator hangs up before the emergency
caller hangs up. However, if the ELIN is not released in this manner, the
usage release timer specifies how long the ELIN remains unavailable for
reassignment. A second timer, the association release timer, specifies how
long an ELIN is associated with the IP address of the calling phone. This
allows an ELIN to be associated with a phone after the usage timer
expires. However, if a new emergency call comes in, the ELIN can be
assigned to the new caller and the old ELIN-phone association is
overwritten.
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