56 Install an E1/T1 card and daughterboardsYou can install the E1/T1 card, DDCH daughterboard, and the DCHIdaughterboard in any order. However, before you define the DCH links(LD 17), you must configure the PRI, PRI2, and DPNSS/DASS loops inthe software (LD 17).Install NTBK51AA/NTBK51CA and NTAK93AB daughterboardsYou can install the NTBK51AA/NTBK51CA or the NTAK93AB, and theE1/T1 card in any order. However, PRI, PRI2 and DPNSS/DASS loops(LD 17) in the PRI Gateway must be configured in software before theDCH links are defined (in LD 17).Follow the steps in Procedure 4 “Installing NTBK51AA/NTBK51CA and theNTAK93AB daughterboards on an E1/T1 card” (page 56).ATTENTIONThe MGP supports both DDCH Daughter Boards (NTBK51) and DCHI DaughterBoards (NTAK93). The only version of the NTBK51 daughterboard that youcan use on a PRI Gateway is the NTBK51AA/NTBK51CA daughterboard thatsupports two E1/T1 spans. You cannot use version NTBK51BA because it hasa different pin configuration (the NTBK51BA is used on OPT11 systems thatsupport only one span). The NTAK93AB DCHI daughterboard supports onlyone E1 span.CAUTIONYou must wear the static discharge bracelet located inside thecabinet before you handle circuit cards. Failure to wear thebracelet can result in damage to the circuit cards.Procedure 4Installing NTBK51AA/NTBK51CA and the NTAK93AB daughterboards on anE1/T1 cardStep Action1 Unpack and inspect the DCH daughterboards.Each daughterboard comes with four standoffs for mounting thedaughterboard on the E1/T1 card.ATTENTIONIf you are installing a DCH daughterboard on the lower side (lowerleft or lower right) of the E1/T1 card, use the standoffs that come withthe DCH daughterboard.If you are installing a DCH daughterboard on the upper side (upperright or upper left) of the E1/T1 card, use the standoffs that come withthe E1/T1 package.2 Align the standoffs on the daughterboard with the mounting holeson the E1/T1 card.Nortel Communication Server 1000Media Gateway 1000E PRI Gateway Installation and CommissioningNN43041-311 04.01 4 June 2010Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
