Multi-Tech Systems MVP-2410 User Manual

18 

H. 323, SIP, & SPP.  Being H.323 compatible, the MVP3010 can place 

calls to telephone equipment at remote IP network locations that also 

contain H.323 compatible voice-over-IP gateways.  It will interface with 

H.323 software and H.323 gatekeeper units. H.323 specifications also 

bring to voip telephony many special features common to conventional 

telephony.  H.323 features of this kind that have been implemented into 

the MultiVOIP include Call Hold, Call Waiting, Call Identification, Call 

Forwarding (from the H.450 standard), and Call Transfer (H.450.2 from 

H.323 Version 2).  The fourth version of the H.323 standard improves 

system resource usage (esp. logical port or socket usage) by handling 

call signaling more compactly and allowing use of the  low-overhead 

UDP protocol instead of the error-correcting TCP protocol where 

possible.    
The MultiVOIP is also SIP-compatible. (“SIP” means Session Initiation 

Protocol.)  However, H.450 Supplementary Services features can be 

used under H.323 only and not under SIP. 
SPP (Single-Port Protocol) is a non-standard protocol developed by 

Multi-Tech. SPP is not compatible with the “Proprietary” protocol used 

in Multi-Tech’s earlier generation of voip gateways.  SPP offers 

advantages in certain situations, especially when firewalls are used and 

when dynamic IP address assignment is needed.  However, when SPP 

is used, certain features of SIP and H.323 will not be available and SPP 

will not inter-operate with voip systems using H.323 or SIP. 
Data Compression & Quality of Service.  The MultiVOIP3010 comes 

equipped with a variety of data compression capabilities, including 

G.723, G.729, and G.711 and features DiffServ quality-of-service (QoS) 

capabilities.   
VOIP Functions.  The MultiVOIP MVP3010 gateway performs four 

basic functions:  (a) it converts a dialed number into an IP address, (b) it 

sends voice over the data network, (c) it establishes a connection with 

another VOIP gateway at a remote site, and (d) it receives voice over 

the data network. Voice is handled as IP packets with a variety of 

compression options.  Each E1 connection to the MultiVOIP provides 30 

time-slot channels to connect to the telco or to serve phone or fax 

stations connected to a PBX. 
Ports.  The MVP3010 also has a 10/100 Mbps Ethernet LAN interface, 

and a Command port for configuration.  An MVP3010 upgraded with 

the MVP30-60 kit will have two Ethernet LAN interfaces and two 

Command ports. 
PSTN Failover Feature.  The MultiVOIP can be programmed to divert 

calls to the PSTN temporarily in case the IP network fails.  
RADIUS Support.  Inter-operation with a RADIUS server allows for 

call accounting (especially for billing) on a voip system.  The MultiVOIP