Mix of E1 and E3 in a Channelized STM-1/OC-3 model SPA-1XCHSTM1/OC3 ?

Unanswered Question
Sep 10th, 2008

The 1-Port Channelized STM-1/OC-3 Shared Port Adapter data sheet states that it supports:

Up to 84 T1 (or 3 T3) or 63 E1 (or 3 E3) ports

Up to 1022 nxDS-0 channels (where n is 1 to 24) with no T3 configured

Up to 400 nxDS-0 channels (where n is 1 to 24) with one or more T3 configured

Is possible a combination of both: E1 and E3 concurrently?

Data Sheets reports combinations with T1 and T3, but does not include anything regarding E1 and E3.

I have this problem too.
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Giuseppe Larosa Wed, 09/10/2008 - 13:21

Hello Albert,

I think you can use a mix of E1 and E3 this is provided by SDH standards

-Port Channelized STM-1/OC-3 SPA Interface Specifications

The framer processes incoming and outgoing SONET or SDH frames. The framer operates at OC-3c/STM-1 line rates (155.52 Mbps).

Packet data is transported with a user-configured encapsulation (such as Point-to-Point Protocol [PPP]) and is mapped into the STS-3c/STM-1 frame.

The 1-Port Channelized STM-1/OC-3 SPA interface is compliant with RFC 1619, PPP over SONET/SDH, and RFC 1662, PPP in HDLC-like Framing. The 1-Port Channelized STM-1/OC-3 SPA also provides support for SNMP v1 agent (RFC 1155-1157), and Management Information Base (MIB) II (RFC 1213).

this is an example taken from cisco IOS XR for GSR but the module is the same:

The following example shows SDH AU-4 configuration.

RP/0/0/CPU0:router# configure

RP/0/0/CPU0:router(config)# controller sonet 0/1/0/0

RP/0/0/CPU0:router(config-sonet)# clock source internal

RP/0/0/CPU0:router(config-sonet)# framing sdh

RP/0/0/CPU0:router(config-sonet)# au 1

RP/0/0/CPU0:router(config-auPath)# mode tug3

RP/0/0/CPU0:router(config-auPath)# width 3

RP/0/0/CPU0:router(config-auPath)# tug3 1

RP/0/0/CPU0:router(config-tug3Path)# mode e3

RP/0/0/CPU0:router(config-tug3Path)# root

RP/0/0/CPU0:router(config)# controller e3 0/1/0/0/0/0

RP/0/0/CPU0:router(config-e3)# mode e1

RP/0/0/CPU0:router(config-e3)# root

RP/0/0/CPU0:router(config)# controller E1 0/1/0/0/0/0/0/0

RP/0/0/CPU0:router(config-e1)# channel-group 0

RP/0/0/CPU0:router(config-e1-channel_group)# timeslots 1-12

RP/0/0/CPU0:router(config-e1-channel_group)# show configuration

RP/0/0/CPU0:router(config-e1-channel_group)# root

RP/0/0/CPU0:router(config)# interface serial 0/1/0/0/0/0:0

Router(config-if)# encapsulation frame-relay | hdlc | ppp

Router(config-if)# ip address

Router(config-if)# no shutdown

RP/0/0/CPU0:router(config-sonet)# commit

RP/0/0/CPU0:router# show controllers sonet 0/1/0/0



Hope to help



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