s interface in business phone 250 1

[ananthnag]

what are the parameters to be checked when enabling s interface in ericsson business phone 250.what are the settings to be changed and checked

 

[TheCurious]

S interface in BP250 is considered as TRUNK, so you have to use trunk screens...

The Curious

 

[LuanCarli]

You have to setup dip switches on BTU-B2 or MFU to setup the S0, the dip switches on the bottom selects link by link the 100ohm resistors and the power feeding on each link. the upper right one the type of link T0-off S0-on. This looking the board on front. Remember to setup T0 lins from the first and S0 from the bottom. On MFU you can set link by link (i.e. one by one) instead on BTU-B2 you have to set the upper dip swich two by two.
After this power up the system (DO NOT CHANGE SWITCHES USING SHUT DOWN OF THE BOARD, TURN OFF THE SYSTEM)
Connect with BMS and go to ISDN link, then on trunks>ISDN>assign I/F type set the link to S.
At this point if you go on the link parameters you'll find the setup for the S bus. Remember to assign a route to the two lines of the link and put this number on the 1958 command, this to call the S0. If you need hot line feature set the 1802 command to the outside route number on both the lines f the link.

Luan

 

[ananthnag]

thank you carli... its working