SMGP协议是SMGW与其它网元设备（除SMC外）进行短消息传输的接口协议。 非SMC网元设备向SMGW发送或从SMGW接收短消息，这些非SMC网元设备称为ESME。(The SMGP protocol is an interface protocol between SMGW and other network element devices (except SMC) for short message transmission. Non SMC network element devic