AudioCodes Mediant 3000 User Manual

Version 7.0 455 Mediant 3000
User's Manual 22. 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.
22.10.1 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 437):

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 applicable only to Mediant 3000 with the TP-6310 blade(s).
22.10.1.1 E1 Trunk Enumeration (SDH Mappings)
The following table is used for converting internal STM-1 (KLM) numbering to sequential
trunk numbering for API references. The three numbers - TUG3 ('K'), TUG2 ('L') and TU
('M') - set the position of the E1 (V-12) trunk inside the STM-1 frame.
Table 22-4: STM-1 Numbering Conversion Table
Trunk ETSI GR-253 Timeslots
TUG-3 TUG-2 TU-12 TUG-3 TUG-2 TU-12 TUG-3 TUG-2 TU-12
1 1 1 1 1 1 1 1 1 1
2 1 1 2 1 2 1 2 1 1

AudioCodes Mediant 3000 Specifications

General

Brand	AudioCodes
Model	Mediant 3000
Category	Gateway
Language	English