DCS Gateway SLT User Guide— 1 —Things You Should Know• Lines from the Telephone Company are “C.O. lines.” Callson these lines are referred to as “outside calls.”• Lines may be assigned to groups. When they are in a group,you access a line by dialling a group access code. For ex-ample, dial 9 to get a local outside line.• DCS provides distinctive ring patterns to your SLT:− Outside calls have a double ring tone repeated.− Internal calls have a single ring tone repeated.Recall / Hookflash KeyA variety of single line telephones (SLTs) are available forconnection to your Gateway system. Most SLTs have a keymarked ‘Recall’; others have a similar key marked ‘R’ or‘Hookflash’. Please note that where an instruction in this guiderequires you to press the Recall key, you should press theequivalent R or Hookflash key if appropriate.System Access CodesYour system is configured with default system access codes forusing the various features described in this guide. These codesare also printed on the back cover for quick reference. How-ever, your system may have been set up to use a different set ofcodes. Therefore, if your system does not work as described inthis guide, refer to your System Administrator for advice.A special table has been provided at the back of this guide foryou to enter the codes required by your system, if differentfrom the default codes.