Because the telecommunications division wanted to take advantage of the system's interestate long-distance network, it ordered three tie trunks
between the PBX and the automatic route selector of the Centrex to handle interstate traffic.
A vast network of private lines, tie trunks
, off-premise extensions, and other leased facilities exists in North America, and many businesses have access to these.
The major benefit of the Alcatel solution is that it will reduce and consolidate the total number of telephone trunk lines that the city owns and permit removal of tie trunks
Hagmaier also plans to use the TeleWall system to analyze call traffic between the system's hospitals for objective data to justify replacing their existing local access trunks with less expensive tie trunks
2 kb/s and use the remaining bandwidth to set up four tie trunks
to carry voice and fax between Upland and the three most remote regional offices.