Ericsson MD110 - 4 Feature-Specific Md110 Programming; Site-Based Call Routing

FEATURE-SPECIFIC MD110 PROGRAMMING LBI-39039B
15
4. FEATURE-SPECIFIC MD110 PROGRAMMING
4.1. SITE-BASED CALL ROUTING
Outbound calls can be routed based on the originating radio site. The MD110 and the PI both control portions of site-
based call routing. The PI controls site-based call routing via a new configuration parameter (SITE_ROUTING_ENABLE,
which is enabled when set to TRUE), but the MD110 performs the actual call routing.
The MD110 can use up to five digits of the incoming number to determine call routing. Three of these digits are
prepended by the PI (1 to indicate the routing tables and 2 to indicate the originating site). Two digits of the incoming
number are analyzed. Outbound calls contain information about the originating EDACS site. The PI prepends a user-defined
routing digit (0-9) (SITE_ROUTING_PREFIX parameter defined in CONFIG.DAT -- default of 6) followed by a 2-digit
originating EDACS site ID (01-32).
The MD110 removes the prepended digits and routes the call to the appropriate trunk using Route Destination Codes
(DEST). There are limitations in the MD110 as to how discriminating the routing based on the called number can be since
the tables used were designed for one or a few codes, and are now divided for 32 sites. The DEST routing table can support
500 entries. The following figure is an example of the site-based routing codes for a two-site system (site 1 and site 2) where
Site 1 Site 2
The MD110 configuration work for routing based on the site of origination and the dialed number is performed as part
of the installation by Applications Engineering.
Call routing out a trunk can be verified by the CTDEI command at the MD110’s FIOL interface. An example of the use
of this command is presented below.
CTDEI Command -- Call To Route Verification
For Route 11 -- (Digital T1 Bothway Trunk)
CTDEI:EQU=1-0-40-2;
CTDEI:EQU=1-0-40-3;
CTDEI:EQU=1-0-40-4;
CTDEI:EQU=1-0-40-5;
A call sent out this route (determined by site-based routing code) will be perceived on one of these ports as an
equipment connection.
Call Type Trunk routed to Call Type Trunk routed to
Local 7-digit Digital= ROU=11 Local 7-digit Analog=ROU=12
Long Distance (1+) Analog=ROU=12 Long Distance (1+) Digital=ROU=11
Operator Assisted (0+) Digital=ROU=11 Operator Assisted (0+) Analog=ROU=12
NOTE