现在非常流行voip技术，这技术能让企业节约电话费用。于是许多大企业都部署了voip网络，从而减少传统电话费用开销。现在我为大家介绍关于E1接入的voip—gateway的配置方法：
一、voip网络的部署规划（例如下图）：
说明:分公司申请的是adsl网络接入，总部公司用的是静态公网ip地址。分公司的Cisco2611网关通过adsl接入，做NHRP over gre 隧道与总部Cisco3640设备相连。Cisco2611网关插有E1模块，E1口接IPBX设备的E1口，IPBX模拟端口接普通电话机。总部通过Cisco3640作为×××服务器连接各个分公司×××客户端设备，总部内部部署了callmanger软交换平台，总部部署了一台ASA5800语音网关，E1口连接IPBX设备。
今天简单为大家介绍怎么配置分公司的gateway设备，总部的软交换平台的配置以后会陆续公布。
hostname C2611_xxx
aaa new-model
!
!
aaa authentication login default local
aaa session-id common
enable secret 5 $1$v20f$0aedAx9Qqo4Qm2xqA6s7d.
!
username solink password 7 120A0A1B1B05072479787170
clock timezone GMT 8
voice-card 0
dspfarm
!
ip subnet-zero
!
!
!
vpdn enable !
vpdn-template
!
vpdn-group 1 /配置vpdn组
request-dialin
protocol pppoe
!
!
isdn switch-type primary-net5 /启用ISDN 交换类型
!
!!
voice class codec 88 /配置语音编码类型组
codec preference 1 g729r8
codec preference 2 g729br8
codec preference 3 g723ar63
codec preference 4 g723ar53
codec preference 5 g723r63
codec preference 6 g723r53
codec preference 7 g711ulaw
codec preference 8 g711alaw
!
!
!
controller E1 0/0
framing NO-CRC4 / 不校验
clock source internal /设置始终端，如果设置不对，电话传真会有问题
pri-group timeslots 1-31 /设置E1通道
!
!
!
!
interface Tunnel13
description link to HK-3640
ip address 10.13.0.102 255.255.255.0 /配置隧道地址
ip nhrp authentication test /设置NHRP验证
ip nhrp map 10.13.0.1 x.x.x.x /设置NHRP单播映射视图
ip nhrp map multicast x.x.x.x /设置NHRP组播映射视图
ip nhrp network-id 100000 /设置网络id号
ip nhrp holdtime 300 /设置超时时间
ip nhrp nhs 10.13.0.1 /设置NHRP服务器地址
tunnel source Dialer0 /设置源地址
tunnel destination x.x.x.x /设置远端地址
tunnel key 500 /设置隧道key
!
interface Ethernet0/0
no ip address
ip nat outside
half-duplex
pppoe enable
pppoe-client dial-pool-number 1 /设置该端口pppoe拨号
!
interface Serial0/0:15 /设置虚拟ISDN接口
no ip address
no logging event link-status
isdn switch-type primary-net5 /设置ISDN 交换类型
isdn overlap-receiving T302 3000 /设置逐位接收等待时间
isdn not-end-to-end 64
isdn incoming-voice network /设置端口为网络端
isdn send-alerting
isdn sending-complete
no cdp enable
!
interface Ethernet0/1
ip address 192.167.102.1 255.255.255.0
half-duplex
ip nat inside
!
interface Dialer0 /设置虚拟模板
ip address negotiated
ip mtu 1492
ip nat outside
encapsulation ppp
dialer pool 1
dialer-group 1
fair-queue 64 16 1
ppp authentication pap callin
ppp pap sent-username szDSL1111@16900.gd password 7 075E731F1A5C4F
ip rtp reserve 2000 16383
!
router eigrp 2
network 10.13.0.0 0.0.0.255
network 192.167.102.0
no auto-summary
no eigrp log-neighbor-changes
!
ip nat inside source list 11 interface Dialer0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer0
no ip http server
ip pim bidir-enable
!
!
access-list 11 permit 192.167.102.0 0.0.0.255
!
call rsvp-sync
!
voice-port 0/0:15
cptone CN /设置编码为中国
bearer-cap Speech
!
dial-peer voice 8166 voip /设置拨号对等体
preference 1
destination-pattern .T
progress_ind alert enable 8
progress_ind progress enable 8
session target ipv4:10.10.10.28
tech-prefix 7100
dtmf-relay cisco-rtp rtp-nte h245-signal h245-alphanumeric
fax-relay ecm disable
fax rate 9600
fax protocol t38 ls-redundancy 1 hs-redundancy 1
!
dial-peer voice 15 voip
incoming called-number 8166T
voice-class codec 88
dtmf-relay cisco-rtp rtp-nte h245-signal h245-alphanumeric
fax-relay ecm disable
fax rate 9600
fax protocol t38 ls-redundancy 1 hs-redundancy 1
!
dial-peer voice 34 voip
preference 2
destination-pattern .T
progress_ind alert enable 8
progress_ind progress enable 8
session target ipv4:10.10.10.8
tech-prefix 7100
dtmf-relay cisco-rtp rtp-nte h245-signal h245-alphanumeric
fax-relay ecm disable
fax rate 9600
fax protocol t38 ls-redundancy 1 hs-redundancy 1
!
dial-peer voice 15 pots
destination-pattern 1111T
direct-inward-dial
port 0/0:15
!
dial-peer voice 33 pots
incoming called-number .T
direct-inward-dial
port 0/0:15
!
