STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
5
6
7
8
9
Unused
Unused
Unused
Unused
Unused
I
I
I
I
I
-
-
-
-
-
I
I
I
I
I
-
-
-
-
-
I
I
I
I
I
-
-
-
-
-
The P1P0S1S2S3S4IR octet carries one bit of the clear channel T1 stream in the I
bit. The R, P and S bits are unused.
T1 tributary asynchronous timing is compensated via the V3 octet. T1 tributary
link rate adjustments are optionally passed across the SBI via the V4. T1
tributary alarm conditions are optionally passed across the SBI bus via the link
rate octet in the V4 location.
E1 Tributary Mapping
Table 24 shows the format for mapping 63 clear channel E1s within the SPE
octets. The I bits carry the clear channel E1 bits. The V1, V2 and V4 octets are
not used to carry E1 data and are either reserved or used for control information
across the interface. When enabled, the V4 octet carries clock phase information
across the SBI. The V1 and V2 octets are unused and should be ignored by
devices listening to the SBI bus. The V5 and R octets do not carry any
information and are fixed to a zero value. The V3 octet carries an E1 data octet
but only during rate adjustments as indicated by the V5 indicator signals, SDV5
and SAV5, and payload signals, SDPL and SAPL.
The V1, V2, V3 and V4 octets are fixed to the locations shown. All the other
octets, shown shaded for E1#1,1, float within the allocated columns maintaining
the same order and moving a maximum of one octet per 2KHz multi-frame. The
position of the floating E1 is identified via the V5 Indicator signals, SDV5 and
SAV5, which locate the V5 octet. When the E1 tributary rate is faster than the E1
tributary nominal rate, the E1 tributary is shifted ahead by one octet which is
compensated by sending an extra octet in the V3 location. When the E1
tributary rate is slower than the nominal rate the E1 tributary is shifted by one
octet which is compensated by inserting a stuff octet in the octet immediately
following the V3 octet and delaying the octet that was originally in that position.
Table 24
– E1 Framing Format
COL # E1#1,1 #2,1-3,21 E1#1,1 #2,1-3,21 E1#1,1 #2,1-3,21 E1#1,1 #2,1-3,21
ROW # 1-18
19
V1
I
20-81
82
V5
I
83-144
145
PP
I
146-207
208
209-270
1
2
Unused
Unused
V1
-
-
-
-
-
I
I
-
-
Proprietary and Confidential to PMC-Sierra, Inc. and for its Customers’ Internal Use
169
PMC [ PMC-SIERRA, INC ]
