Abstract: A drainpipe test plug for plugging a drainpipe via an opening formed therein includes a plug seal that includes a planar front surface which faces upward in the drainpipe whenever the drainpipe test plug is in a plugging position and a peripheral annular rim. The plug seal can include a plurality of holes or a continuous channel formed into the surface of the planar front surface, or a plurality of holes or a continuous channel formed into the surface of the peripheral annular rim, or both. The plug seal holes or channels impart a degree of flexibility to a peripheral area of the plug seal to facilitate the insertion and removal of the drainpipe test plug from the drainpipe. In addition, the holes or channel in the planar front surface provide additional sealing force against the interior of the drainpipe whenever the drainpipe test plug is in the plugging position.

Abstract: A drainpipe test plug for plugging a drainpipe via an opening formed therein includes a plug seal that includes a planar front surface which faces upward in the drainpipe whenever the drainpipe test plug is in a plugging position and a peripheral annular rim. The plug seal can include a plurality of holes or a continuous channel formed into the surface of the planar front surface, or a plurality of holes or a continuous channel formed into the surface of the peripheral annular rim, or both. The plug seal holes or channels impart a degree of flexibility to a peripheral area of the plug seal to facilitate the insertion and removal of the drainpipe test plug from the drainpipe. In addition, the holes or channel in the planar front surface provide additional sealing force against the interior of the drainpipe whenever the drainpipe test plug is in the plugging position.

Abstract: A method and network node are presented to route a signaling message in a SS7/C7 national telecommunication network between a Border Node within a first licensed operator network and a destination node within a second licensed operator network. The first and second licensed operator networks use the same Point Code configuration numbering plan to identify Point Codes of each node into their respective network. The Border Node includes a Message Transfer Part (MTP). Upon receipt of a signaling message, the Message Transfer Part (MTP) of the Border Node maps an Origination Point Code (OPC) and a Destination Point Code (DPC) corresponding to numbering plan values of the one of the licensed operator networks into OPC and DPC corresponding to the other licensed operator network. After that, the MTP replaces the OPC and DPC by the mapped OPC and DPC and the signaling message is sent from the Border Node to the destination node.

Abstract: A method and network node are presented to route a signaling message in a SS7/C7 national telecommunication network between a Border Node within a first licensed operator network and a destination node within a second licensed operator network. The first and second licensed operator networks use the same Point Code configuration numbering plan to identify Point Codes of each node into their respective network. The Border Node includes a Message Transfer Part (MTP). Upon receipt of a signaling message, the Message Transfer Part (MTP) of the Border Node maps an Origination Point Code (OPC) and a Destination Point Code (DPC) corresponding to numbering plan values of the one of the licensed operator networks into OPC and DPC corresponding to the other licensed operator network. After that, the MTP replaces the OPC and DPC by the mapped OPC and DPC and the signaling message is sent from the Border Node to the destination node.