text: anyone can help explain to me 32kbps/16kbps time slot in sdh or pdh?   pdh = plesiochronous digital hierachy.  e1 – a 2048 kbit/s framed pdh signal connected to electrical interface e12. it has a basic frame structure of 32 timeslots or octets at a frame rate of 125 msec. two octets (consecutive timeslots 0) are used for the transport overhead. for additional quality of service, a crc–4 multi-frame is used consisting of 16 basic frames at a multiframe rate of 2 ms.  e3 – a 34 368 kbit/s framed pdh signal connected to electrical interface e31. it has a frame structure of 59 octet columns and 9 rows plus 6 octets at a frame rate of 125 msec. 7 octets are used for the transport overhead.  ds1 – a 1544 kbit/s framed pdh signal connected to electrical interface e11. it has a basic frame structure of 24 timeslots or octets and a single bit transport overhead per frame at a frame rate of 125 msec. 24 basic frames form an extended superframe with a frame rate of 3 ms.  ds3 – a 44 736 kbit/s framed pdh signal connected to electrical interface e32. it has a basic frame structure of 680 bit columns and 7 rows. each row consists of 8 blocks containing 1 transport overhead bit and 84 payload bits. the frame rate is 106 msec.