BANGLADESH TELECOMMUNICATIONS COMPANY LIMITED - BTCl

Book 2Chapter NineRequirements of Signaling, Protocols and Interfaces9.1 Inter-Node SignalingThe following inter-node signaling capabilities will be provided in the system. Absenceand deviation (both) shall be considered as “Change of Substance”.9.1.1 Common Channel Signaling No. 7 (CCS7)The CCS7 Signaling shall be based on ITU-T White Book or later version ofrecommendations. Moreover, it shall be backward compatible with Blue Book variantsprevailing in Bangladesh. The prospective Bidder shall make his own survey aboutversions or sub-sets used, if any, in BTCL.9.1.2 ISDN PRA SignalingThe system shall support full version of ISDN Primary Rate Access (PRA) Signaling onITU-T E1 as per ITU-T recommendation.9.2 NGN ProtocolThe system must support the following protocols:a) H.248/ MEGACO protocol for communication between Soft Switch andGateways, according to the following standards:i) ITU-T H.248 Gateway Control Protocol (identical to IETF RFC3015 updatedwith RFC3525 : MEGACO Protocol)ii) RFC2327 : Session Description Protocol (SDP)Any deviation shall be considered as “Change of Substance”b) SIP-I protocol for interworking with other Soft Switch, according to the ITU-TRecommendation Q.1912.5 standardAny deviation shall be considered as “Change of Substance”c) SIP protocol for the control of the residential gateways, according to thefollowing standards:i) IETF Recommendation RFC 3261ii) IETF Recommendation RFC 3262Any deviation shall be considered as “Change of Substance”d) SS7 over IP based on SCTP (SIGTRAN) according to the following standards.i) IETF Recommendation RFC 3331 – (M2UA) or RFC 3332 – (M3UA)ii) IETF Recommendation RFC 3057 – (IUA)Book 2 :: Tender on Replacement of Old Telephones in Dhaka City Page: 45 of 153