[57] A method for preparing a water insoluble biocompatible composition comprising reacting a polyanionic polysaccharide with divinyl sulfone in an aqueous solution to form a gel, neutralizing the pH of the solution, and precipitating a solid from the solution.
[57] Multiplex transmission equipment comprising an echo canceller for cancelling an echo from counterpart multiplex transmission equipment, mixed in a transmission signal input from an exchange side and characterized by the provision of: an encoding part for encoding a speech signal contained in said transmission signal output from the echo canceller and for demodulating a facsimile signal contained in said transmission signal; a multiplexing part for multiplexing the transmission signal encoded or demodulated by the encoding part and for outputting the multiplexed signal to said counterpart multiplex transmission equipment; and a signaling code detecting circuit for detecting a line signaling signal based on a change in a code of a specific time slot of the input signal from said exchange side; wherein the echo cancellation by said echo canceller is suspended when the line signaling signal is detected by said signaling code detecting circuit.
__________
151534
[21][11]
מערכת ושיטה לבקרת ומעקב של שיחה אלחוטית נודדת
SYSTEM AND METHOD FOR CONTROLLING AND MONITORING A WIRELESS ROAMING CALL
[54]
27.02.2001
[22]
US
[33]
29.02.2000
[32]
60/186067
[31]
Int. Cl.8 H04M 011/00, H04Q 007/20
[51]
VERISIGN, INC., U.S.A.
[71]
WO/2001/065872
[87]
ריינהולד כהן ושותפיו,
רחוב אחד העם 21 , ת.ד. 4060, תל אביב
REINHOLD COHN AND PARTNERS,
21 AHAD HA'AM ST.,
P.O.B. 4060,
TEL AVIV 61040
[74]
[57] A wireless telecommunications network for providing telecommunications services to at least one credit limited wireless subscriber in a plurality of wireless subscribers, the network including at least one home mobile switching center, the home mobile switching center including a home location register, and the network including at least one serving mobile switching center, the serving mobile switching center including a visiting location register; and the network comprising: switching means for switching telecommunications calls; mobile station means for placing and receiving the telecommunications calls; register means for providing a national location register, the register means coupled with the home mobile switching center, the register means further coupled with the serving mobile switching center; wherein the register means communicates as the visiting location register with the home mobile switching center and as the home location register with the serving mobile switching center; wherein the register means is configured to receive messages from the home mobile switching center and from the serving mobile switching center; and wherein the register means is further configured to transmit roaming information regarding the messages to a roaming server, wherein the roaming server is configured to perform rear-time call, control and credit limited account base billing, based on the roaming information.