2N PRI Gateways - User Manual - Manual (Page 68)

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- Preferred channel > number of first channel which the gateway will try to occupy.
- Progress elements numbers – defines which type of element progress will gateway send in
messages SETUP_ACK, PROGRESS, CALL_PROCEEDING, ALERTING. The number
depends on PBX/ROUTER which you have connected. You have to set right number according
your PBX. In case that you use wrong number or set sending of the element, it can cause
problems on PRI ISDN trunk (no connected calls, no opened B-channel…)
Dec Meaning
1 Call is not end-to-end ISDN or may be in-band information
2 Destination call address is non-ISDN
3 Origination call address is non-ISDN
4 Call has returned to the ISDN
8 Inband treatment has been applied
10 Delay in response at the call interface
- TEI management – gateway identification address (0 by default, 62 max.)
- CRC – Parameter for Activating/deactivating receiving CRC on Layer 1 on PRI ISDN interface. (In
both modes the PRIGW sending CRC).
- Assignment of B-channels – defines how the gateway shall route outgoing calls to the GSM network.
-
Cyclical – the gateway routes outgoing calls according to pre-defined groups
(prefixes). The GSM modules are assigned to the groups automatically according
to the GSM provider (GSM network number). If more GMS modules (SIM cards)
are assigned to a group for outgoing calls, these GSM modules are occupied
gradually in a rotating way (1. > 2. > 3. > 4. > 1. > 2. …)
- Locked – the gateway does not provide intelligent outgoing call routing. Calls on
the x-th B-channel are made via the x-th GSM module. However, it is necessary to
define and select so many GSM groups as there are SIM card types in the
gateway.
-
According to credit – the gateway routes calls as in the rotating mode but selects
the GSM modules according to the lowest number of called minutes instead of
cyclically.
Caution! Be sure to select the GSM groups according to available providers while
selecting the Assignment of B-channels=locked!
*) If you do not have the appropriate crosses/non-crossed interconnection cable
(depending on the configuration of the equipment connected to the PRIGW ), you can
re-set the gateway PRI board jumpers to achieve functional connection.
- Error ISDN causes – Definition of causes sent to PRI ISDN (in the Release Complete) whenever
an incoming call from PRI ISDN is rejected.
- Few digits on OVERLAP dial mode – Rejection of an incoming call that does not meet the
required number length (default cause: 102-Timeout).
- Disallowed dial number prefix – Rejection of an incoming call whose prefix does not match
any of the prefixes defined for GSM groups (default cause: 21-Reject)
- Selected module/GSM group are not ready – Rejection of an incoming call because no free
module has been found in the particular GSM group (the assigned GSM module is not
available for the „Locked Channels“ mode) and no other preferred GSM groups have been
selected (default cause: 41-Tempfail).
- Selected module/GSM groups are not ready – Rejection of an incoming call because no
free module has been found in the defined GSM group + preferred groups have been
selected for overflow but no free outgoing GSM module has been found here (default cause:
42-Swcongest.