Analog Loop-Start Trunks (EMEA) Trunk Planning and Ordering 5
ShoreTel 14 Planning and Installation Guide 89
Analog Loop-Start Trunks (EMEA)
Analog Loop-Start trunks are supported in Europe, the Middle East, and Africa. These trunks use the
TBR 21 standard.
Analog loop-start Trunks (EMEA) are typically used for inbound calls to a main telephone number that
are directed to an auto-attendant menu, company operator, or workgroup. A caller can route a call from
the auto-attendant to a user extension by entering the extension number or by spelling the user’s
name from the telephone keypad. Analog loop-start trunks are also used to make outbound calls.
Analog loop-start trunks (EMEA) support:
BT type 1 (on hook) caller ID support is based on SIN 227 and SIN 242 standards in the UK.
Analog provisioning is provided by the loop-start protocol and Dual-Tone Multi-Frequency (DTMF)
Analog loop-start trunks are used to provide power-fail transfer to selected telephones — for instance,
to the operator, security station, executives, and so on. When there is a complete power failure,
including loss of UPS power backup, the ShoreTel Voice Switches provides power-fail transfer. Refer
to the ShoreTel System Administration Guide for the power-fail transfer port on each ShoreTel Voice
Switch that supports this feature. This power-fail transfer ability provides a dial tone for making and
taking critical calls in the event of power failure.
Centrex lines are analog lines that can be used as analog loop-start trunks on the ShoreTel Voice
Switches. Your organization may already have these installed, and want to use them instead of
ordering new loop-start trunks. If you have Centrex lines and do not want to change your primary
company telephone number, you can keep Centrex lines. Centrex lines support Caller ID. Be sure to
remove the Centrex features, including call waiting, call forward, and voice mail.
Digital Loop-Start Trunks
Digital loop-start trunks are typically used for inbound calls to the main telephone number that are
directed to an auto-attendant menu, company operator, or workgroup. A caller can route a call from the
auto-attendant to a user extension by entering the extension number or by spelling the user’s name
from the telephone keypad. Digital loop-start trunks are also used to make outbound calls.
Digital loop-start trunks support the following:
Caller ID number
Caller ID name
Caller ID blocking