Physical description 719Table 269Supported trunk and signaling matrixSignalingRLMRLR ATV TIE PAGCSACAACAM2-wire E and M yes yes yes yes yes4-wire E and M yes yes yes yes yesPhysical descriptionThe line interface and common multiplexing circuitry is mounted on a 31.75cm by 25.40 cm (12.5 in. by 10 in.) printed circuit board.The E and M Trunk card connects to the backplane through a 160-pinconnector shroud. External equipment connects to the card at the backof the Media Gateway using a 25-pin connector. Telephone lines fromstation equipment cross connect to the OPS analog line card at the MDFusing a wiring plan similar to that used for line cards. See CommunicationServer 1000M and Meridian 1 Large System Installation and Configuration(NN43021-310) for termination and cross connect information.Each card provides four circuits. Each circuit connects with the switchingsystem and with the external apparatus by an 80-pin connector at the rearof the pack. Each trunk circuit on the card connects to trunk facilities by tipan ring leads which carry voice, ringing, tone signaling and battery. Trunkoption selection is determined by software control in LD 14.Figure 223 "E and M Trunk card - faceplate" (page 721) illustrates thefaceplate of the E and M Trunk card. The words "Dict Trk" appear on thefaceplate label because earlier versions of this card provided dictation trunkconnections for third-party equipment.The faceplate of the card is equipped with a red LED. When an E and Mtrunk card is installed, the LED remains lit for two to five seconds whilethe self-test runs. If the self-test completes successfully, the LED flashesthree times and remains lit. When the card is configured and enabled insoftware, then the LED goes out. If the LED continues to flash or remainsweakly lit, replace the card.The E and M trunk has a microprocessor which performs a number ofoperations. On power up a self test of the circuitry on the card is performed.The self-test can also be requested by a command entered in maintenanceprograms. The card faceplate Light-Emitting Diode (LED) is lit while the selftest is performed. If the self test passes, the faceplate LED flashes threetimes and stays lit until the card is enabled in software. If the test fails,the LED stays lit (does not flash).Nortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.
