DTMF ANI signaling on an incoming SBS bearer call could interfere with the SBS invoked DTMF signaling set to identify the correct bearer call. This service should not be subscribed to on trunk groups that may be used to deliver SBS bearer calls.

If you use in-band call transfer capability from a network Service Provider (like Take back and Transfer) and subscribe to a notify option, the incoming DTMF signals on an SBS bearer call will cause the SBS bearer call to fail. This service should not be subscribed to on trunk groups that may be used to deliver SBS bearer calls.

If you subscribe to Alternate Destination Routing, they must take care to not include the SBS extension numbers in the DID/DDI blocks subject to reroute. If such alternate routing occurs, the incoming SBS bearer call cannot be associated with its SBS signaling call and will be dropped.

Hong Kong DTMF Supplementary Services information will not be displayed to the endpoint user on an SBS call since the display contains information from the SBS signaling call.

Macedonia E1 Support for PPM messages will not be displayed to the endpoint user when this type trunk is used as an SBS bearer because bearer trunk signaling does not impact user displays on SBS calls.

Calling Party Number (CPN) information received on an SBS bearer call will be tandemed on the SBS bearer call but it will not be displayed to the endpoint user. It is available for Call Detail Recording (CDR) on the bearer call record.

An analog station connected to a MM711 port with Incoming Call ID will see the SBS signaling information when making or receiving an SBS call.

US Analog Trunk & Line - MM714 - Supports SBS.

Country specific functionality that does not require end user activation, acknowledgement, or display will be supported on SBS bearer calls. For example, China Disconnect on No-Answer will disconnect the bearer call and the SBS signaling call will also disconnect.

Disconnect supervision for an SBS bearer call is provided/processed as usual for that type of bearer trunk. If no disconnect supervision is available on a trunk used for an SBS bearer call, then disconnect supervision will be provided by the SBS signaling call. Dropping either the SBS bearer call or the SBS signaling call will drop the associated SBS signaling/bearer call respectively.

For ISDN trunks, the Incoming Call Handling Table may be used to delete leading digits of the SBS bearer call’s called number to direct the call to the indicated SBS Extension. Digit manipulation must not modify the extension portion of the number, or the SBS bearer call will not terminate to the indicated SBS Extension and thus cannot be associated with its SBS signaling call.

For non-ISDN trunks or ISDN bearer trunks using overlap receiving, insertion/deletion may also be used to direct the SBS bearer call to the indicated SBS Extension. Again, digit manipulation must not modify the extension portion of the number, or the SBS bearer call will not terminate to the indicated SBS Extension and thus cannot be associated with its SBS signaling call.

Where ANI is received on an incoming non-SBS call, and the call is tandemed to another Communication Manager using SBS, the received ANI information will be tandemed in the SBS signaling call to the far end per current QSIG interworking procedures. The network interfaces that may receive ANI and then tandem to a SBS call include:

For the No Disconnect Supervision Trunk Operation, the SBS signaling call will control disconnect supervision for the associated bearer call.