8-4 Dialable Wideband Service
297-2521-106 Standard 23.01 March 2001
Constraints
The following constraints apply to processing wideband calls:
• The trunk group must be either ISUP FGD, PRI, or MWC ISUP-IMT.
• The SELSEQ field in Table TRKGRP must be set to wideband.
• The selector in the route list must be supported for wideband services.
• Group reset circuit is supported but not with respect to a controlling or
non-controlling channel or when it has a channel assignment map.
• The following is not supported:
— reseller trunks and release link trunks
— TCAP
— in-band tones datafilled through the TRMT route selector
— reorigination
— rate adaptation
— operator-assisted calls
— remote access to VNET
— off-hook queuing
— internal echo cancelers
— CARD services
— SAC remote calls
Protocol datafill
Operating company personnel identify the desired protocol version when
establishing datafill values in Table TRKSGRP. The version field associates
the particular wideband service protocol for each trunk group. The DWS
protocol expected on the PRI trunk is defined in the version field of Table
TRKSGRP (shown in Figure 8-3) and is UNISPEC20 for MWC. (The
UNISPEC20 protocol is defined in the UNISPEC document, S/DMS
SuperNode DWS User-Network Interface Specification, NIS A216-1.)
Protocol version information is also identified in the appropriate fields in the
BC and CID information elements of the setup message.
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