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Posted by KC (166.102.177.68) on December 27, 2002 at 08:49:30:
In Reply to: SDH jitter to big ? posted by Ricy on December 26, 2002 at 06:04:22:
: ???My question is what source for synchronization I must use or how I must
: config the synchronization at the Add/Drop Mux´s in Stations???
: I use an electrical back to back connection.
: The Alcatel SDH equipment chain is as follows:
: #Station1:
: ADD/drop_Mux[(21x2Mbit)>STM1] >>
: Radio_Link_4GHz assembly[RSA(STM1) + MOD/dem + SRS + TX/rx] >>
: #Station2:
: Radio_Link_4GHz assembly[RX/tx;SRS;DEM/mod;RSA(STM1)] >>Add/DROP_Mux[(STM1)>21x2 Mbit]
: Here is the back to back connection: this 21x2Mbit
: are directly electrical connected with:
: ADD/drop_Mux[21x2Mbit>(STM1)] >>
: Radio_Link_4GHz assembly[RSA(STM1) + MOD/dem + SRS + TX/rx] >>
: #Station3:
: Radio_Link_4GHz assembly[RX/tx;SRS;DEM/mod;RSA(STM1)] >>
: add/DROP_Mux(21x2 Mbit).
: #Subscriber for E1: 2Mbit (ETI) DAB(digital audio broadcasting) signal
: from Station1 to Station3.
: #In Station3 the (ETI) DAB is inserted in the DAB R&S Transmitter; but
: this one comes in Alarm because the jitter is to Big)
: #Over the Whole SDH link Station1 to Station2 there are no Alarms.
: #No External Sync source is used for the moment.
: ???My question is what source for synchronization I must use or how I must
: config the synchronization at the Add/Drop Mux´s in Stations???
: Thanks and kind regards, Ricy
: OtherInfo:
: The equipments we have in use are:
: # Wireline 1511 (15 x Voice Channel + 15 x 64kbps)
: # Wireline 1515 (cross connect for 1511)
: # SDH 1651SMC (Add/drop MUX)(3x34Mbps + 21x2Mbps + STM1)
: # Radio 96HTMN40 (4 & 6 GHz) (32 QAM & 128 QAM)
: # Analoge (ETSI) video codecs 1722VC (for Pal+ )
: # MPEG video codecs 1761VC
: # Equipment Manager 1353EM R1.7.1PC3 On Sun Solaris.
: Ricy.
RE: Have you tried contacting Alcatel's Tech Support to get their advice on how to properly synchronize this particular configuration. I worked at Nortel for years and also Rockwell, which was purchased by Alcatel and these type of questions were dealt with daily. I won't try to answer your question but will point you to some material that may help you understand some of the synchronization concepts for these networks.
Try the url below and good luck: