AudioCodes Mediant 3000, User Manual

Page: 319 / 872

Version 6.6 319 Mediant 3000
User's Manual 21. Digital PSTN
Relevant parameters:
•
PSTNTransmissionType - set to 'Optical SONET or SDH' (1).
•
SDHFbrGrp_SDHSONETMode - set to "OC3" (2)
•
SDHFbrGrp_Mapping_Type set to one of the following:
♦
'Asynchronous VT1.5 and DS1' (0) for Asynchronous VT.15 application
♦
'Byte-synchronous TU11 and DS1' (2) for Byte-synchronous VT.15
application
♦
'Asynchronous mapping of DS3 in STS1, DS3 channelized to DS1s' (3) for
Asynchronous mapping of DS3 in STS1.
♦
Trunks can be DS1s only – configured using the parameter ProtocolType
The blade supports Trunk Numbering:

STM-1: trunk numbers are in the range of 0 to 62 (E1s)

OC-3: trunk numbers are in the range of 0 to 83 (T1s)
Trunks are numbered according to ETSI EN 300 417-1-1, Annex D recommendation.
21.10.1 Trunk Numbering (KLM Numbering)
Trunks are numbered sequentially while corresponding SDH/SONET instances
(timeslots/columns) have three referenced numbers built hierarchically.These complex
triple numbering is referred to as KLM numbering. Selection of a KLM numbering scheme
is important when interconnecting different equipment, e.g., the device and a multiplexer. If
different KLM numbering schemes are selected on either equipment, a mismatch occurs in
the trunk sequential numbering.
The device supports the following three KLM numbering schemes (selected using the
SDHFbrGrp_KLM_Numbering_Scheme parameter - see 'Configuring Transmission
Settings' on page
304 ):

ETSI scheme according to ETSI EN 300 417-1-1, Annex D

GR-253 scheme according to GR-253-CORE Issue 3 September 2000

Timeslots scheme according to ITU-T G.707 clause 7.3.9. (Hardware timeslots)
Once the scheme has been selected, the corresponding table is automatically determined
for 63 or 84 tributaries (trunks).
Note: This section is only applicable to Mediant 3000 with the TP-6310 blade(s).