Phaser 6180MFP Multifunction Printer Service Manual 4-89General Troubleshooting2. Response signal was not sent.Cause: No connection. Incorrect setup of dial type, line type, and/orreception mode.Corrective Action: Reconnect the telephone line. Reset the dial type,line type, and/or receive mode to correct settings.NoteIf a call is made to the Fax from a telephone, and the Fax does not emit itsringing sound, a telephone line fault is highly probable. Be sure anexternal telephone line is connected prior checking for a ring tone.Other ProblemsBranch Connection (Parallel Connection)During Fax reception, if the handset of another telephone on a branchconnection is lifted, the received image may be corrupted or a transmissionerror may occur. Branch connection may also interfere with Caller ID, CallWaiting, or the receiving operation of the connected telephones.Call WaitingIf a call comes in during Fax sending/reception, the image may be corrupted.Digital Subscriber LineDigital Subscriber Line (DSL) is a high-speed digital transmission methodusing existing telephone lines. Because the line is used for both voice anddata transmission, various problems may occur, such as noise during spokenconversation, low sound volume, and mis-dialing. Replacing the splitter mayimprove the situation.The Digital Subscriber Line cannot be directly connected to a fax machine;the line must be connected via a filter.There are several types of DSL:■ ADSL (Asymmetric Digital Subscriber Line) – Transmits digitalinformation at a high-speed bandwidth on phone lines. ADSL providescontinuously available connection with differing upstream anddownstream transmission speeds and simultaneously accommodatesanalog (voice) and digital information on the same line. Downstream datarates are offered from 512 Kbps to about 6 Mbps.■ SDSL (Symmetric Digital Subscriber Line) – Runs over one pair of copperwires with symmetrical upstream and downstream transmission speedsup to 3 Mbps, with a maximum range up to 3 km.■ VDSL (Very high Bit Rate Digital Subscriber Line) – An xDSL technologythat provides faster data transmission over a single twisted pair of copperwires. VDSL transmits data from 13 Mbps ~ 55 Mbps range over shortdistances, usually between 1000 and 4500 feet.
